A-286 (S66286) Screws

HASM is an ISO 9001:2015, AS9100D and ISO 14001:2015 certified manufacturer and worldwide supplier of standard & custom A-286 (S66286) screws. We also manufacture A-286 (S66286) screws from these other materials: Hastelloy® C-22, Hastelloy® B-2, Hastelloy® G-30, Monel® 400, Monel® K-500, Inconel® 600, Inconel® 625, Inconel® 718, Incoloy® A-286, Titanium Grade 2, Titanium Grade 5, Titanium Grade 7, Duplex S31803, Duplex S32205 and Super Duplex S32750, to name a few.

A-286 (S66286) 12 Point Flange Screws

HASM is an ISO 9001:2015, AS9100D and ISO 14001:2015 certified manufacturer and worldwide supplier of standard & custom A-286 (S66286) 12 point flange screws. We also manufacture 12 point flange screws from these other materials: Hastelloy® C-276, Hastelloy® C-22, Hastelloy® B-2, Hastelloy® G-30, Monel® 400, Monel® K-500, Inconel® 600, Inconel® 625, Inconel® 718, Incoloy® A-286, Titanium Grade 2, Titanium Grade 5, Titanium Grade 7, Duplex S31803, Duplex S32205 and Super Duplex S32750, to name a few.

A-286 (S66286) Flange Screws

HASM A-286 (S66286) 12 Point Flange Screws are manufactured by the cold heading and hot forming technologies in nominal diameters ranging from 1/8”- 3” (M3 – M80). We offer A-286 (S66286) fasteners in both USCS/Imperial and metric sizes.

HASM’s advanced and comprehensive range of capabilities include engineering, R&D, prototyping, custom manufacturing, precision processing and testing. All HASM materials are sourced from the most reputable and exacting foundries in the world. We maintain a multi-million-dollar inventory of A-286 (S66286) fasteners in our product warehouse, which enables HASM to select, package and expedite your A-286 (S66286) 12 point flange screw order quickly.

We are globally recognized as the emerging leader of high-quality, A-286 (S66286) fasteners and are proud to serve our distributors, EPCs, OEM and MRO customers worldwide.

HASM A-286 (S66286) fasteners meet applicable ASTM, ANSI, ASME, SAE, API, NAS, AN, MS, NACE, ISO, DIN, and KS standards.

The markets we serve include Chemical Processing, Semiconductor, Power Generation, Aerospace, Oil & Gas, Pharmaceutical, Food & Beverage, Marine, Pulp & Paper, Petrochemical & Refining, Air Pollution Control, and Water Treatment.

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12 Point Flange Screw Dimensions Table

Download 12 Point Flange Screw Table



Dimensions of 12-Point Flange Screws
IFI-115-2002
Nominal Size or Basic Major Diameter of Thread		E	C		F		G	H	J	K	Runout of Bearing Surface FIM	M		La	Bearing Surface Juncture Radius	X	A		T		LT	Y
		Body Diameter Min.	Flange Diameter		Width Across Flats		Width Across Corners	Head Height	Wrenching Height	Flange Thickness		Filet Extension		Fillet Length		Chamfer or Radius	Gaging Ring Thickness		Gaging Ring Diameter	Gaging Ring Diameter	Thread Length	Transition Thread Length
													Fillet Extension	Fillet Length					Gaging Ring Diameter	Gaging Ring Diameter
			Max.	Min.	Max.	Min.	Min.	Max.	Min.	Min.	Max.	Max.	Min.	Max.	Bearing Surface Juncture Radius	Max.	Max.	Min.	Max.	Min.	Basic	Max.
1/4	0.2500	0.2435	0.375	0.365	0.252	0.244	0.278	0.260	0.15	0.058	0.007	0.014	0.009	0.087	0.007	0.020	0.0525	0.0522	0.2783	0.2780	1.000	0.25
5/16	0.3125	0.3053	0.469	0.457	0.315	0.306	0.348	0.312	0.18	0.074	0.008	0.017	0.012	0.087	0.009	0.020	0.06	0.0597	0.3483	0.3480	1.125	0.28
3/8	0.3750	0.3678	0.562	0.550	0.377	0.368	0.420	0.375	0.21	0.095	0.010	0.020	0.015	0.087	0.012	0.020	0.0711	0.0708	0.4203	0.4200	1.250	0.31
7/16	0.4375	0.4294	0.656	0.642	0.438	0.429	0.489	0.438	0.25	0.109	0.011	0.023	0.018	0.087	0.014	0.030	0.084	0.0837	0.4893	0.4890	1.375	0.36
1/2	0.5000	0.4919	0.750	0.735	0.502	0.493	0.562	0.500	0.29	0.129	0.013	0.026	0.020	0.087	0.016	0.030	0.0948	0.0945	0.5623	0.5620	1.500	0.38
9/16	0.5625	0.5538	0.844	0.828	0.564	0.555	0.633	0.563	0.33	0.145	0.015	0.029	0.022	0.157	0.018	0.030	0.1071	0.1068	0.6333	0.6330	1.625	0.42
5/8	0.6250	0.6163	0.938	0.921	0.627	0.618	0.705	0.625	0.36	0.166	0.016	0.032	0.024	0.157	0.021	0.040	0.1179	0.1176	0.7053	0.7050	1.750	0.46
3/4	0.7500	0.7406	1.125	1.107	0.752	0.743	0.847	0.750	0.44	0.200	0.020	0.039	0.030	0.157	0.025	0.040	0.1416	0.1413	0.8473	0.8470	2.000	0.50
7/8	0.8750	0.8647	1.312	1.293	0.877	0.866	0.987	0.875	0.51	0.234	0.023	0.044	0.034	0.227	0.031	0.040	0.1656	0.1653	0.9873	0.9870	2.250	0.56
1	1.0000	0.9886	1.500	1.479	1.003	0.991	1.130	1.000	0.60	0.268	0.026	0.050	0.040	0.332	0.034	0.040	0.1893	0.189	1.1303	1.1300	2.500	0.62
1-1/8	1.1250	1.1086	1.688	1.665	1.128	1.115	0.271	1.125	0.66	0.310	0.029	0.055	0.045	0.332	0.039	0.050	0.2109	0.2106	1.2713	1.2710	2.750	0.71
1-1/4	1.2500	1.2336	1.875	1.852	1.253	1.240	1.414	1.250	0.73	0.350	0.033	0.060	0.050	0.332	0.044	0.050	0.2331	0.2328	1.4143	1.4140	3.000	0.71
1-3/8	1.3750	1.3568	2.062	2.038	1.378	1.365	1.556	1.375	0.80	0.392	0.036	0.065	0.055	0.332	0.048	0.050	0.2544	0.2541	1.5563	1.5560	3.250	0.83
1-1/2	1.5000	1.4818	2.250	2.224	1.503	1.489	1.697	1.500	0.87	0.433	0.039	0.070	0.060	0.332	0.052	0.050	0.2763	0.276	1.6973	1.6970	3.500	0.83

NOTE: ALL A-286 (S66286) 12 Point Flange Screws DIMENSIONS ARE IN INCHES.

INCONEL®, MONEL®, INCOLOY® and 800HT® are registered trademark of the Special Metals Corporation group of companies.

HASTELLOY® is a registered trademark of Haynes International Inc.

Zircadyne® is a registered trademark of the ATI Properties Inc. companies.

Request a Quote from HASM

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Hastelloy Hexagon Socket Head Cap Screws

HASM is an ISO 9001:2015, AS9100D and ISO 14001:2015 certified manufacturer and worldwide supplier of standard & custom hexagon A-286 (S66286) socket head cap screws. We also manufacture hexagon socket head cap screws from these other materials: Hastelloy® C-276, Hastelloy® C-22, Hastelloy® B-2, Hastelloy® G-30, Monel® 400, Monel® K-500, Inconel® 600, Inconel® 625, Inconel® 718, Incoloy® A-286, Titanium Grade 2, Titanium Grade 5, Titanium Grade 7, Duplex S31803, Duplex S32205 and Super Duplex S32750, to name a few.

A-286 (S66286) Cap Screws

HASM Co. Ltd. Manufactures and Supplies Nickel Alloy hex socket head screws

HASM A-286 (S66286) Hexagon Socket Head Cap Screws are manufactured by the cold heading and hot forming technologies in nominal diameters ranging from 1/8”- 3” (M3 – M80). We offer A-286 (S66286) fasteners in both USCS/Imperial and metric sizes.

We are globally recognized as the emerging leader of high-quality, A-286 (S66286) fasteners and are proud to serve our distributors, EPCs, OEM and MRO customers worldwide.

HASM A-286 (S66286) fasteners meet applicable ASTM, ANSI, ASME, SAE, API, NAS, AN, MS, NACE, ISO, DIN, and KS standards.

Hexagon Socket Head Cap Screw Dimensions Table

Download Hex Socket Head Cap Screw Table



Dimensions of Hexagon Socket Head Cap Screws
ASME B 18.3-2002
Nominal Size (Basic Product Diameter)		D		A		H		C	J		T	G	K
		Body Diameter		Head Diameter		Head Height		Maximum Chamferor Radius	Nominal Hexagon Socket Size		Minimum Key Engagement	Minimum Wall Thickness	Maximum Chamferor Radius

		Max.	Min.	Max.	Min.	Max.	Min.
5	(0.1250)	0.1250	0.1202	0.205	0.198	0.125	0.121	0.012	3/32	0.094	4 0.057	0.043	0.008
6	(0.1380)	0.1380	0.1329	0.226	0.216	0.138	0.134	0.013	7/64	0.109	0.064	0.047	0.008
8	(0.1640)	0.1640	0.1585	0.270	0.257	0.164	0.159	0.014	9/64	0.141	0.077	0.056	0.008
10	(0.1900)	0.1900	0.1840	0.312	0.298	0.190	0.185	0.018	5/32	0.156	0.090	0.065	0.008
12	(0.2160)	0.2160	0.2095	0.324	0.314	0.216	0.210	0.022	5/32	0.156	0.103	0.082	0.010
1/4	(0.2500)	0.2500	0.2435	0.375	0.354	0.250	0.244	0.025	3/16	0.188	0.120	0.095	0.010
5/16	(0.3125)	0.3125	0.3053	0.469	0.446	0.312	0.306	0.033	1/4	0.250	0.151	0.119	0.010
3/8	(0.3750)	0.3750	0.3678	0.562	0.540	0.375	0.368	0.040	5/16	0.312	0.182	0.143	0.010
7/16	(0.4375)	0.4375	0.4294	0.656	0.631	0.438	0.430	0.047	3/8	0.375	0.213	0.166	0.015
1/2	(0.5000)	0.5000	0.4919	0.750	0.725	0.500	0.492	0.055	3/8	0.375	0.245	0.190	0.015
9/16	(0.5625)	0.5625	0.5538	0.843	0.827	0.562	0.554	0.062	7/16	0.437	0.276	0.214	0.015
5/8	(0.6250)	0.6250	0.6163	0.938	0.914	0.625	0.616	0.070	1/2	0.500	0.307	0.238	0.015
3/4	(0.7500)	0.7500	0.7406	1.125	1.094	0.750	0.740	0.085	5/8	0.625	0.370	0.285	0.015
7/8	(0.8750)	0.8750	0.8647	1.312	1.291	0.875	0.864	0.100	3/4	0.750	0.432	0.333	0.020
1	(1.0000)	1.0000	0.9886	1.500	1.476	1.000	0.988	0.114	3/4	0.750	0.495	0.380	0.020
1-1/8	(1.1250)	1.1250	1.1086	1.688	1.665	1.125	1.111	0.129	7/8	0.875	0.557	0.428	0.020
1-1/4	(1.2500)	1.2500	1.2336	1.875	1.852	1.250	1.236	0.144	7/8	0.875	0.620	0.475	0.020
1-3/8	(1.3750)	1.3750	1.3568	2.062	2.038	1.375	1.360	0.160	1	1.000	0.682	0.523	0.020
1-1/2	(1.5000)	1.5000	1.4818	2.250	2.224	1.500	1.485	0.176	1	1.000	0.745	0.570	0.020
1-3/4	(1.7500)	1.7500	1.7295	2.625	2.597	1.750	1.734	0.207	1-1/4	1.250	0.870	0.665	0.020
2	(2.0000)	2.0000	1.9780	3.000	2.970	2.000	1.983	0.238	1-1/2	1.500	0.995	0.760	0.020
2-1/4	(2.2500)	2.2500	2.2280	3.375	3.344	2.250	2.232	0.269	1-3/4	1.750	1.120	0.855	0.036
2-1/2	(2.5000)	2.5000	2.4762	3.750	3.717	2.500	2.481	0.300	1-3/4	1.750	1.245	0.950	0.036
2-3/4	(2.7500)	2.7500	2.7262	4.125	4.090	2.750	2.730	0.332	2	2.000	1.370	1.045	0.036
3	(3.0000)	3.0000	2.9762	4.500	4.464	3.000	2.979	0.363	2-1/4	2.250	1.495	1.140	0.036
3-1/4	(3.2500)	3.2500	3.2262	4.875	4.837	3.250	3.228	0.394	2-1/4	2.250	1.620	1.235	0.036
3-1/2	(3.5000)	3.5000	3.4762	5.250	5.211	3.500	3.478	0.426	2-3/4	2.750	1.745	1.330	0.036
3-3/4	(3.7500)	3.7500	3.7262	5.625	5.584	3.750	3.727	0.458	2-3/4	2.750	1.870	1.425	0.036
4	(4.0000)	4.0000	3.9762	6.000	5.958	4.000	3.976	0.489	3	3.000	1.995	1.520	0.036

NOTE: ALL A-286 (S66286) Cap Screws DIMENSIONS ARE IN INCHES.

INCONEL®, MONEL®, INCOLOY® and 800HT® are registered trademark of the Special Metals Corporation group of companies.

HASTELLOY® is a registered trademark of Haynes International Inc.

Zircadyne® is a registered trademark of the ATI Properties Inc. companies.

Request a Quote from HASM

We're here to help!

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A-286 (S66286) Hex Socket Flat Countersunk Head Cap Screws

HASM is an ISO 9001:2015, AS9100D and ISO 14001:2015 certified manufacturer and worldwide supplier of standard & custom A-286 (S66286) hex socket flat countersunk screws. We also manufacture hex socket flat countersunk cap screws from the following materials: Hastelloy® C-276, Hastelloy® C-22, Hastelloy® B-2, Hastelloy® G-30, Monel® 400, Monel® K-500, Inconel® 600, Inconel® 625, Inconel® 718, Incoloy® A-286, Titanium Grade 2, Titanium Grade 5, Titanium Grade 7, Duplex S31803, Duplex S32205 and Super Duplex S32750, to name a few.

A-286 (S66286) Hex Socket Screws

HASM A-286 (S66286) Hex Socket Flat Head Cap Screws are manufactured by the cold heading and hot forming technologies in nominal diameters ranging from 1/8”- 3” (M3 – M80). We offer A-286 (S66286) fasteners in both USCS/Imperial and metric sizes.

We are globally recognized as the emerging leader of high-quality, A-286 (S66286) fasteners and are proud to serve our distributors, EPCs, OEM and MRO customers worldwide.

HASM A-286 (S66286) fasteners meet applicable ASTM, ANSI, ASME, SAE, API, NAS, AN, MS, NACE, ISO, DIN, and KS standards.

Hex Socket Flat Countersunk Head Cap Screw Dimensions Table

Download Hex Socket Countersunk Head Screw Table



Dimensions of Hexagon Socket Flat Countersunk Head Cap Screws
ASME B18.3-2002
Nominal Size (Basic Screw Diameter)		D		A		H	G		P		J		T	F
		Body Diameter		Head Diameter		Reference Head Height	Protrusion Gage Diameter		Protrusion		Nominal Hexagon Socket Size		Minimum Key Engagement	Maximum Fillet Transition Diameter

		Max.	Min.	Max.	Min.		Max.	Min.	Max.	Min.
5	(0.1250)	0.1250	0.1202	0.281	0.240	0.090	0.196	0.195	0.059	0.037	5/64	0.078	0.061	0.153
6	(0.1380)	0.1380	0.1329	0.307	0.263	0.097	0.220	0.219	0.060	0.037	5/64	0.078	0.066	0.168
8	(0.1640)	0.1640	0.1585	0.359	0.311	0.112	0.267	0.266	0.063	0.039	3/32	0.094	0.076	0.194
10	(0.1900)	0.1900	0.1840	0.411	0.359	0.127	0.313	0.312	0.066	0.041	1/8	0.125	0.087	0.220
12	(0.2158)	0.2158	0.2102	0.450	0.410	0.135	0.360	0.359	0.069	0.042	1/8	0.125	0.094	0.246
1/4	(0.2500)	0.2500	0.2435	0.531	0.480	0.161	0.424	0.423	0.072	0.043	5/32	0.156	0.111	0.280
5/16	(0.3125)	0.3125	0.3053	0.656	0.600	0.198	0.539	0.538	0.078	0.047	3/16	0.188	0.135	0.343
3/8	(0.3750)	0.3750	0.3678	0.781	0.720	0.234	0.653	0.652	0.088	0.050	7/32	0.219	0.159	0.405
7/16	(0.4375)	0.4375	0.4294	0.844	0.781	0.234	0.690	0.689	0.104	0.063	1/4	0.250	0.159	0.468
1/2	(0.5000)	0.5000	0.4919	0.938	0.872	0.251	0.739	0.738	0.131	0.087	5/16	0.312	0.172	0.530
5/8	(0.6250)	0.6250	0.6163	1.188	1.112	0.324	0.962	0.961	0.146	0.096	3/8	0.375	0.220	0.655
3/4	(0.7500)	0.7500	0.7406	1.438	1.355	0.396	1.186	1.185	0.170	0.105	1/2	0.500	0.220	0.780
7/8	(0.8750)	0.8750	0.8647	1.688	1.604	0.468	1.411	1.410	0.165	0.118	9/16	0.562	0.248	0.905
1	(1.0000)	1.0000	0.9886	1.938	1.841	0.540	1.635	1.634	0.181	0.130	5/8	0.625	0.297	1.030
1-1/8	(1.1250)	1.1250	1.1086	2.188	2.079	0.611	1.859	1.858	0.196	0.140	3/4	0.750	0.325	1.187
1-1/4	(1.2500)	1.2500	1.2336	2.438	2.316	0.683	2.083	2.082	0.212	0.150	7/8	0.875	0.358	1.312
1-3/8	(1.3750)	1.3750	1.3568	2.688	2.553	0.755	2.306	2.305	0.228	0.162	7/8	0.875	0.402	1.437
1-1/2	(1.5000)	1.5000	1.4818	2.938	2.791	0.827	2.530	2.529	0.243	0.173	1	1.000	0.435	1.562

NOTE: ALL DIMENSIONS ARE IN INCHES.

INCONEL®, MONEL®, INCOLOY® and 800HT® are registered trademark of the Special Metals Corporation group of companies.

HASTELLOY® is a registered trademark of Haynes International Inc.

Zircadyne® is a registered trademark of the ATI Properties Inc. companies.

Request a Quote from HASM

We're here to help!

Request a Quote

A-286 (S66286) Flat Countersunk Trim Head Screws

HASM is an ISO 9001:2015, AS9100D and ISO 14001:2015 certified manufacturer and worldwide supplier of standard & custom flat A-286 (S66286) countersunk trim head screws. We also manufacture countersunk trim head screws from the following materials: Hastelloy® C-276, Hastelloy® C-22, Hastelloy® B-2, Hastelloy® G-30, Monel® 400, Monel® K-500, Inconel® 600, Inconel® 625, Inconel® 718, Incoloy® A-286, Titanium Grade 2, Titanium Grade 5, Titanium Grade 7, Duplex S31803, Duplex S32205 and Super Duplex S32750, to name a few.

A-286 (S66286) Trim Head Screws

HASM Co. Ltd. Manufactures and Supplies Nickel Alloy Flat Head Screws

HASM A-286 (S66286) Flat Countersunk Trim Head Screws are manufactured by the cold heading and hot forming technologies in nominal diameters ranging from 1/8”- 3” (M3 – M80). We offer A-286 (S66286) fasteners in both USCS/Imperial and metric sizes.

We are globally recognized as the emerging leader of high-quality, A-286 (S66286) fasteners and are proud to serve our distributors, EPCs, OEM and MRO customers worldwide.

A-286 (S66286) fasteners meet applicable ASTM, ANSI, ASME, SAE, API, NAS, AN, MS, NACE, ISO, DIN, and KS standards.

Flat Countersunk Trim Head Screw Dimensions Table

Download Flat Countersunk Trim Head Screw Table



Recess Dimensions for Flat Countersunk Trim Head Screws						Recess Dimensions for Flat Countersunk Trim Head Screws
ASME B18.6.3-2013
Nominal Size or Basic Screw Diameter		Type I
		Head Size	M	Driver Size	P
			Recess Diameter		Recess Penetration Gaging Depth
					Max.	Min.
5	0.1250	4	0.122	1	0.082	0.066
6	0.1380	4	0.122	1	0.082	0.066
6	0.1380	5	0.148	2	0.075	0.052
8	0.1640	5	0.158	2	0.085	0.062
8	0.1640	6	0.176	2	0.103	0.080
10	0.1900	8	0.182	2	0.110	0.087
12	0.2160	8	0.192	2	0.120	0.097
12	0.2160	10	0.198	2	0.125	0.102
14	0.2420	10	0.198	2	0.125	0.102
14	0.2420	12	0.262	3	0.139	0.116
1/4	0.2500	10	0.198	2	0.125	0.102
1/4	0.2500	12	0.262	3	0.139	0.116
5/16	0.3125	12	0.262	3	0.139	0.116
5/16	0.3125	1/	0.276	3	0.154	0.131
3/8	0.3750	5/16	0.358	4	0.196	0.174

NOTE: ALL DIMENSIONS ARE IN INCHES.

INCONEL®, MONEL®, INCOLOY® and 800HT® are registered trademark of the Special Metals Corporation group of companies.

HASTELLOY® is a registered trademark of Haynes International Inc.

Zircadyne® is a registered trademark of the ATI Properties Inc. companies.

Request a Quote from HASM

We're here to help!

Request a Quote

A-286 (S66286) Hexagon Socket Button Head Cap Screws

HASM is an ISO 9001:2015, AS9100D and ISO 14001:2015 certified manufacturer and worldwide supplier of standard & custom A-286 (S66286) hexagon socket button head cap screws. We also manufacture hexagon socket button head cap screws from the following materials: Hastelloy® C-276, Hastelloy® C-22, Hastelloy® B-2, Hastelloy® G-30, Monel® 400, Monel® K-500, Inconel® 600, Inconel® 625, Inconel® 718, Incoloy® A-286, Titanium Grade 2, Titanium Grade 5, Titanium Grade 7, Duplex S31803, Duplex S32205 and Super Duplex S32750, to name a few.

A-286 (S66286) Button Head Cap Screws

HASM Co. Ltd. Manufactures and Supplies Nickel Alloy Round Head Screws

HASM A-286 (S66286) Hexagon Socket Button Head Cap Screws are manufactured by the cold heading and hot forming technologies in nominal diameters ranging from 1/8”- 3” (M3 – M80). We offer A-286 (S66286) fasteners in both USCS/Imperial and metric sizes.

We are globally recognized as the emerging leader of high-quality, A-286 (S66286) fasteners and are proud to serve our distributors, EPCs, OEM and MRO customers worldwide.

HASM A-286 (S66286) fasteners meet applicable ASTM, ANSI, ASME, SAE, API, NAS, AN, MS, NACE, ISO, DIN, and KS standards.

Hexagon Socket Button Head Cap Screw Dimensions Table

Download Hex Socket Screw Table



Dimensions of Hexagon Socket Button Head Cap Screws
ASME B18.3 - 2012
Nominal Size (Basic Screw Diameter)		A		H		S	J		T	F		L
		Head Diameter		Head Height		Head Side Height	Nominal Hexagon Socket Size		Minimum Key Engagement	Fillet Extension		Nominal Maximum Standard Length

		Max.	Min.	Max.	Min.					Max.	Min.
5	(0.1250)	0.238	0.226	0.066	0.058	0.015	5/64	0.078	0.044	0.145	0.145	0.50
6	(0.1380)	0.262	0.250	0.073	0.063	0.015	5/64	0.078	0.044	0.158	0.148	0.63
8	(0.1640)	0.312	0.298	0.087	0.077	0.015	3/32	0.094	0.052	0.194	0.184	0.75
10	(0.1900)	0.361	0.347	0.101	0.091	0.020	1/8	0.125	0.070	0.220	0.210	1.00
1/4	(0.2500)	0.437	0.419	0.132	0.122	0.031	5/32	0.156	0.087	0.290	0.280	1.00
5/16	(0.3125)	0.547	0.527	0.166	0.152	0.031	3/16	0.188	0.105	0.353	0.343	1.00
3/8	(0.3750)	0.656	0.636	0.199	0.185	0.031	7/32	0.219	0.122	0.415	0.405	1.25
7/16	(0.4375)	0.765	0.746	0.231	0.218	0.031	1/4	0.250	0.140	0.478	0.468	1.50
1/2	(0.5000)	0.875	0.851	0.265	0.245	0.046	5/16	0.312	0.175	0.560	0.540	2.00
5/8	(0.6250)	1.000	0.970	0.331	0.311	0.062	3/8	0.375	0.210	0.685	0.665	2.00
3/4	(0.7500)	1.125	1.105	0.375	0.355	0.062	7/16	0.437	0.245	0.740	0.720	2.50

NOTE: ALL DIMENSIONS ARE IN INCHES.

INCONEL®, MONEL®, INCOLOY® and 800HT® are registered trademark of the Special Metals Corporation group of companies.

HASTELLOY® is a registered trademark of Haynes International Inc.

Zircadyne® is a registered trademark of the ATI Properties Inc. companies.

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A-286 (S66286) Hex Socket Set Screws

HASM is an ISO 9001:2015, AS9100D and ISO 14001:2015 certified manufacturer and worldwide supplier of standard & custom Hastelloy C-276 (N10276) hex socket set screws. We also manufacture hex socket set screws from the following materials: Hastelloy® C-276, Hastelloy® C-22, Hastelloy® B-2, Hastelloy® G-30, Monel® 400, Monel® K-500, Inconel® 600, Inconel® 625, Inconel® 718, Incoloy® A-286, Titanium Grade 2, Titanium Grade 5, Titanium Grade 7, Duplex S31803, Duplex S32205 and Super Duplex S32750, to name a few.

HASM is an ISO 9001 ISO 14001 AS9001D certified manufacturer and worldwide supplier of standard & custom set screws. Materials include: Hastelloy, Inconel, Duplex, Super Duplex, Monel and Titanium. Use our convenient Request a Quote for quick delivery.

HASM A-286 (S66286) Hex Socket Set Screws are manufactured in nominal diameters ranging from 1/8”- 3” (M3 – M80). We offer A-286 (S66286) fasteners in both USCS/Imperial and metric sizes.

We are globally recognized as the emerging leader of high-quality, A-286 (S66286) fasteners and are proud to serve our distributors, EPCs, OEM and MRO customers worldwide.

HASM A-286 (S66286) fasteners meet applicable ASTM, ANSI, ASME, SAE, API, NAS, AN, MS, NACE, ISO, DIN, and KS standards.

Hex Socket Set Screw Dimensions Table

Download Hex Socket Set Screw Table



Dimensions of Hexagon Socket Set Screws
ASME B18.3-2012
Nominal Size (Basic Screw Diameter)		J		T	C		R	Y	P		Q		B			B₁
		Nominal Hexagon Socket Size		Minimum Key Engagement to Develop Functional Capability of Key	Cup and FlatPoint Diameters		Basic Oval Point Radius	Cone Point Angle 90 deg ± 2 deg for These Nominal Lengths or Longer: 118 deg ± 2 deg for Shorter Nominal Lengths	Half Dog Point				Shortest Optimum Nominal Length to Which TH Applies			Nominal Length to Which TS Applies


									Diameter		Length		Cup and Flat Points	90 deg Cone and Oval Points	Half Dog Point	Cup and Flat Points	90 deg Cone and Oval Points	Half Dog Point
				Hex Socket, TH	Max.	Min.			Max.	Min.	Max.	Min.
5	(0.1250)	1/16	0.062	0.080	0.067	0.057	0.094	0.19	0.083	0.078	0.033	0.027	0.19	0.19	0.19	0.13	0.19	0.19
6	(0.1380)	1/16	0.062	0.080	0.074	0.064	0.104	0.19	0.092	0.087	0.038	0.032	0.19	0.25	0.19	0.13	0.25	0.19
8	(0.1640)	5/64	0.078	0.090	0.087	0.076	0.123	0.25	0.109	0.103	0.043	0.037	0.19	0.25	0.25	0.19	0.25	0.25
10	(0.1900)	3/32	0.094	0.100	0.102	0.088	0142	0.25	0.127	0.120	0.049	0.041	0.19	0.25	0.25	0.19	0.25	0.25
1/4	(0.2500)	1/8	0.125	0.125	0.132	0.118	0.188	0.31	0.156	0.149	0.067	0.059	0.25	0.31	0.31	0.25	0.31	0.31
5/16	(0.3125)	5/32	0.156	0.156	0.172	0.156	0.234	0.38	0.203	0.195	0.082	0.074	0.31	0.44	0.38	0.31	0.44	0.38
3/8	(0.3750)	3/16	0.188	0.188	0.212	0.194	0.281	0.44	0.250	0.241	0.099	0.089	0.38	0.44	0.44	0.38	0.44	0.44
7/16	(0.4375)	7/32	0.219	0.219	0.252	0.232	0.328	0.50	0.297	0.287	0.114	0.104	0.44	0.63	0.50	0.44	0.63	0.50
1/2	(0.5000)	1/4	0.250	0.250	0.291	0.270	0.375	0.57	0.344	0.334	0.130	0.120	0.50	0.63	0.63	0.50	0.63	0.63
5/8	(0.6250)	5/16	0.312	0.312	0.371	0.347	0.469	0.75	0.469	0.456	0.164	0.148	0.63	0.88	0.88	0.63	0.88	0.88
3/4	(0.7500)	3/8	0.375	0.375	0.450	0.425	0.562	0.88	0.562	0.549	0.196	0.180	0.75	1.00	1.00	0.75	1.00	1.00
7/8	(0.8750)	1/2	0.500	0.500	0.530	0.502	0.656	1.00	0.656	0.642	0.227	0.211	0.88	1.00	1.00	0.88	1.25	1.00
1	(1.0000)	9/16	0.562	0.562	0.609	0.579	0.750	1.13	0.750	0.734	0.260	0.240	1.00	1.25	1.25	…	…	…
1-1/8	(1.1250)	9/16	0.562	0.562	0.689	0.655	0.844	1.25	0.844	0.826	0.291	0.271	1.25	1.50	1.25	…	…	…
1-1/4	(1.2500)	5/8	0.625	0.625	0.767	0.733	0.938	1.50	0.938	0.920	0.323	0.303	1.25	1.50	1.50	…	…	…
1-3/8	(1.3750)	5/8	0.625	0.625	0.848	0.808	1.031	1.63	1.031	1.011	0.354	0.334	1.50	1.75	1.50	…	…	…
1-1/2	(1.5000)	3/4	0.750	0.750	0.926	0.886	1.125	1.75	1.125	1.105	0.385	0.365	1.50	2.00	1.75	…	…	…
1-3/4	(1.7500)	1	1.000	1.000	1.086	1.039	1.312	2.00	1.312	1.289	0.448	0.428	1.75	2.25	2.00	…	…	…
2	(2.0000)	1	1.000	1.000	1.244	1.193	1.500	2.25	1.500	1.474	0.510	0.490	2.00	2.50	2.50	…	…	…

NOTE: ALL DIMENSIONS ARE IN INCHES.

INCONEL®, MONEL®, INCOLOY® and 800HT® are registered trademark of the Special Metals Corporation group of companies.

HASTELLOY® is a registered trademark of Haynes International Inc.

Zircadyne® is a registered trademark of the ATI Properties Inc. companies.

Request a Quote from HASM

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A-286 (S66286) Slotted Truss Head Machine Screws

HASM is an ISO 9001:2015, AS9100D and ISO 14001:2015 certified manufacturer and worldwide supplier of standard & custom A-286 (S66286) slotted truss head machine screws. We also manufacture slotted truss head machine screws from the following materials: Hastelloy® C-276, Hastelloy® C-22, Hastelloy® B-2, Hastelloy® G-30, Monel® 400, Monel® K-500, Inconel® 600, Inconel® 625, Inconel® 718, Incoloy® A-286, Titanium Grade 2, Titanium Grade 5, Titanium Grade 7, Duplex S31803, Duplex S32205 and Super Duplex S32750, to name a few.

A-286 (S66286) Machine Screws

HASM Co. Ltd. Manufactures and Supplies Nickel Alloy Truss Head Screws

*Sample cross head type shown above. Most applicable types offered.

HASM A-286 (S66286) Slotted Truss Head Machine Screws are manufactured by the cold heading and hot forming technologies in nominal diameters ranging from 1/8”- 3” (M3 – M80). We offer A-286 (S66286) fasteners in both USCS/Imperial and metric sizes.

We are globally recognized as the emerging leader of high-quality, A-286 (S66286) fasteners and are proud to serve our distributors, EPCs, OEM and MRO customers worldwide.

HASM A-286 (S66286) fasteners meet applicable ASTM, ANSI, ASME, SAE, API, NAS, AN, MS, NACE, ISO, DIN, and KS standards.

Slotted Truss Head Machine Screw Dimensions Table

Download Slotted Truss Head Screw Table



Dimensions of Slotted Truss Head Machine Screws
ASME B 18.6.3-2003
Nominal Size or Basic Screw Diameter		A		H		R	J		T
		Head Diameter		Head Height		Head Radius	Slot Width		Slot Depth

		Max.	Min.	Max.	Min.	Max.	Max.	Min.	Max.	Min.
5	0.1250	0.289	0.272	0.078	0.066	0.191	0.043	0.035	0.045	0.034
6	0.1380	0.321	0.303	0.086	0.074	0.211	0.048	0.039	0.050	0.037
8	0.1640	0.384	0.364	0.102	0.088	0.254	0.054	0.045	0.058	0.045
10	0.1900	0.448	0.425	0.118	0.103	0.283	0.060	0.050	0.068	0.053
12	0.2160	0.511	0.487	0.134	0.118	0.336	0.067	0.056	0.077	0.061
1/4	0.2500	0.573	0.546	0.150	0.133	0.375	0.075	0.064	0.087	0.070
5/16	0.3125	0.698	0.666	0.183	0.162	0.457	0.084	0.072	0.106	0.085
3/8	0.3750	0.823	0.787	0.215	0.191	0.538	0.094	0.081	0.124	0.100
7/16	0.4375	0.948	0.907	0.248	0.221	0.619	0.094	0.081	0.142	0.116
1/2	0.5000	1.073	1.028	0.280	0.250	0.701	0.106	0.091	0.161	0.131
9/16	0.5625	1.198	1.149	0.312	0.279	0.783	0.118	0.102	0.179	0.146
5/8	0.6250	1.323	1.269	0.345	0.309	0.863	0.133	0.116	0.196	0.162
3/4	0.7500	1.573	1.511	0.410	0.368	1.024	0.149	0.131	0.234	0.182

NOTE: ALL DIMENSIONS ARE IN INCHES.

INCONEL®, MONEL®, INCOLOY® and 800HT® are registered trademark of the Special Metals Corporation group of companies.

HASTELLOY® is a registered trademark of Haynes International Inc.

Zircadyne® is a registered trademark of the ATI Properties Inc. companies.

Request a Quote from HASM

We're here to help!

Request a Quote

A-286 (S66286) Type I Cross Recessed Pan Head Screws

HASM is an ISO 9001:2015, AS9100D and ISO 14001:2015 certified manufacturer and worldwide supplier of standard & custom A-286 (S66286) type I cross recessed pan head screws. We also manufacture type I cross recessed pan head screws from the following materials: Hastelloy® C-276, Hastelloy® C-22, Hastelloy® B-2, Hastelloy® G-30, Monel® 400, Monel® K-500, Inconel® 600, Inconel® 625, Inconel® 718, Incoloy® A-286, Titanium Grade 2, Titanium Grade 5, Titanium Grade 7, Duplex S31803, Duplex S32205 and Super Duplex S32750, to name a few.

A-286 (S66286) Pan Head Screws

HASM is an ISO 9001 ISO 14001 AS9001D certified manufacturer and worldwide supplier of standard & custom pan head screws. Materials include: Hastelloy, Inconel, Duplex, Super Duplex, Monel and Titanium. Use our convenient Request a Quote for quick delivery.

HASM A-286 (S66286) Type I Cross Recessed Pan Head Screws are manufactured by the cold heading and hot forming technologies in nominal diameters ranging from 1/8”- 3” (M3 – M80). We offer A-286 (S66286) fasteners in both USCS/Imperial and metric sizes.

We are globally recognized as the emerging leader of high-quality, A-286 (S66286) fasteners and are proud to serve our distributors, EPCs, OEM and MRO customers worldwide.

HASM A-286 (S66286) fasteners meet applicable ASTM, ANSI, ASME, SAE, API, NAS, AN, MS, NACE, ISO, DIN, and KS standards.

Type I Cross Recessed Pan Head Screw Dimensions Table

Download Type 1 Cross Recessed Truss



Dimensions of Type I Cross Recessed Pan Head Screws
ASME B 18.6.3-2013
Nominal Size or Basic Screw Diameter		A		H		R	M	Driver Size	P
		Head Diameter		Head Height		Head Radius	Recess Diameter		Recess Penetration Gaging Depth

		Max.	Min.	Max.	Min.				Max.	Min.
5	0.1250	0.245	0.231	0.089	0.079	0.015	0.152	2	0.072	0.046
6	0.1380	0.270	0.256	0.097	0.087	0.015	0.159	2	0.080	0.055
7	0.1510	0.296	0.281	0.106	0.096	0.015	0.170	2	0.089	0.064
8	0.1640	0.322	0.306	0.115	0.105	0.015	0.175	2	0.097	0.071
10	0.1900	0.373	0.357	0.133	0.122	0.020	0.192	2	0.113	0.089
12	0.2160	0.425	0.407	0.151	0.139	0.025	0.252	3	0.124	0.098
14	0.2420	0.476	0.457	0.169	0.156	0.035	0.274	3	0.144	0.118
1/4	0.2500	0.492	0.473	0.175	0.162	0.035	0.274	3	0.144	0.118
16	0.2680	0.528	0.508	0.187	0.173	0.035	0.286	3	0.158	0.132
18	0.2940	0.579	0.558	0.205	0.191	0.035	0.328	4	0.158	0.134
5/16	0.3125	0.615	0.594	0.218	0.203	0.040	0.343	4	0.173	0.149
20	0.3200	0.631	0.608	0.223	0.208	0.040	0.344	4	0.173	0.149
24	0.3720	0.734	0.709	0.259	0.242	0.040	0.382	4	0.213	0.190
3/8	0.3750	0.740	0.716	0.261	0.244	0.040	0.382	4	0.213	0.190
7/16	0.4375	0.863	0.837	0.305	0.284	0.050	0.406	4	0.239	0.214
1/2	0.5000	0.987	0.958	0.348	0.325	0.055	0.428	4	0.260	0.235
9/16	0.5625	1.041	1.000	0.391	0.366	0.065	0.458	4	0.292	0.268
5/8	0.6250	1.172	1.125	0.434	0.406	0.075	0.575	5	0.310	0.281
3/4	0.7500	1.435	1.375	0.521	0.488	0.085	0.621	5	0.349	0.322

NOTE: ALL DIMENSIONS ARE IN INCHES.

INCONEL®, MONEL®, INCOLOY® and 800HT® are registered trademark of the Special Metals Corporation group of companies.

HASTELLOY® is a registered trademark of Haynes International Inc.

Zircadyne® is a registered trademark of the ATI Properties Inc. companies.

Request a Quote from HASM

We're here to help!

Request a Quote

A-286 (S66286) Type II Cross Recessed Truss Head Machine Screw

HASM is an ISO 9001:2015, AS9100D and ISO 14001:2015 certified manufacturer and worldwide supplier of standard & custom A-286 (S66286) type II cross recessed truss head machine screws. We also manufacture type II cross recessed truss head machine screws from the following materials: Hastelloy® C-276, Hastelloy® C-22, Hastelloy® B-2, Hastelloy® G-30, Monel® 400, Monel® K-500, Inconel® 600, Inconel® 625, Inconel® 718, Incoloy® A-286, Titanium Grade 2, Titanium Grade 5, Titanium Grade 7, Duplex S31803, Duplex S32205 and Super Duplex S32750, to name a few.

A-286 (S66286) Type II

HASM A-286 (S66286) Type II Cross Recessed Truss Head Machine Screws are manufactured by the cold heading and hot forming technologies in nominal diameters ranging from 1/8”- 3” (M3 – M80). We offer A-286 (S66286) fasteners in both USCS/Imperial and metric sizes.

We are globally recognized as the emerging leader of high-quality, A-286 (S66286) fasteners and are proud to serve our distributors, EPCs, OEM and MRO customers worldwide.

HASM A-286 (S66286) fasteners meet applicable ASTM, ANSI, ASME, SAE, API, NAS, AN, MS, NACE, ISO, DIN, and KS standards.

Type II Cross Recessed Truss Head Machine Screw Dimensions Table

Download Type II Truss Screws Table



Dimensions of Type II Cross Recessed Truss Head Machine Screws
ASME B 18.6.3-2003											ASME B.18.6.3-2003
Nominal Size or Basic Screw Diameter		A		H		R	M	T	N	Recess Penetration Gaging Depth
		Head Diameter		Head Height		Head Radius	Recess Diameter	Recess Depth	Recess Width

		Max.	Min.	Max.	Min.					Max.	Min.
5	0.1250	0.289	0.272	0.078	0.066	0.191	0.157	0.086	0.033	0.068	0.057
6	0.1380	0.321	0.303	0.086	0.074	0.211	0.175	0.097	0.035	0.079	0.068
8	0.1640	0.384	0.364	0.102	0.088	0.254	0.209	0.115	0.041	0.102	0.091
10	0.1900	0.448	0.425	0.118	0.103	0.283	0.244	0.138	0.046	0.126	0.113
12	0.2160	0.511	0.487	0.134	0.118	0.336	0.279	0.160	0.051	0.148	0.136
1/4	0.2500	0.573	0.546	0.150	0.133	0.375	0.313	0.174	0.057	0.171	0.157
5/16	0.3125	0.698	0.666	0.183	0.162	0.457	0.382	0.219	0.067	0.217	0.201
3/8	0.3750	0.823	0.787	0.215	0.191	0.538	0.446	0.261	0.076	0.259	0.242
7/16	0.4375	0.948	0.907	0.248	0.221	0.619	0.511	0.304	0.086	0.303	0.284
1/2	0.5000	1.073	1.028	0.280	0.250	0.701	0.588	0.354	0.097	0.354	0.333
9/16	0.5625	1.198	1.149	0.312	0.279	0.783	0.588	0.354	0.097	0.354	0.333
5/8	0.6250	1.323	1.269	0.345	0.309	0.863	0.588	0.354	0.097	0.354	0.333
3/4	0.7500	1.573	1.511	0.410	0.368	1.024	0.588	0.354	0.097	0.354	0.333

NOTE: ALL DIMENSIONS ARE IN INCHES.

INCONEL®, MONEL®, INCOLOY® and 800HT® are registered trademark of the Special Metals Corporation group of companies.

HASTELLOY® is a registered trademark of Haynes International Inc.

Zircadyne® is a registered trademark of the ATI Properties Inc. companies.

Request a Quote from HASM

We're here to help!

Request a Quote