Truss Head Screws

HASM is an ISO 9001:2008 certified manufacturer and worldwide supplier of standard and custom truss head screws including those manufactured by the following materials: Hastelloy® C-276, Hastelloy® C-22; Monel® 400, Monel® K-500; Inconel® 600, Inconel® 625, Inconel® 718; and Titanium Grade-2, Titanium Grade-5, Titanium Grade-7; Duplex S31803, Duplex S32205 and Super Duplex S32750, to name a few.

Truss Head Screws

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 fasteners in our product warehouse, which enables HASM to select, package and expedite your Truss Head Screw order quickly.

HASM is an ISO 9001:2008 and ISO 14001:2004 certified manufacturer pending AS9100 Revision D (2016) Certificate for Aviation, Space and Defense Organizations. We are globally recognized as the emerging leader of high-quality, nickel alloy fasteners and are proud to serve our distributors, EPCs, OEM and MRO customers worldwide.

HASM Truss Head Screws meet applicable ANSI, ASTM, ASME, DIN, SAE specifications.

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.

Truss Head Screw Material Options

Alloy C276 | UNS N10276 | Hastelloy® C-276
Alloy 22 | UNS N06022 | Hastelloy® C-22
Alloy 400 | UNS N04400 | Monel® 400
Alloy K500 | UNS N05500 | Monel® K-500
Alloy 600 | UNS N06600 | Inconel® 600
Alloy 625 | UNS N06625 | Inconel®625
Alloy 718 | UNS N07718 | Inconel®718
Alloy 800HT® | UNS N08811 | Incoloy® 800HT®
Alloy 825 | UNS N08825 | Incoloy® 825
Zr 702 | UNS R60702 | Zircadyne® Zirconium 702
Zr 705 | UNS R60705 | Zircadyne® Zirconium 705
Ti-Gr-2 | UNS R50400 | Titanium Grade 2
Ti-6Al-4V | UNS R56400 | Titanium Grade 5
Ti-Gr-7 | UNR R52400 | Titanium Grade 7
6% Mo Alloys (6% Molybdenum Alloys):
- UNS S31254 | Alloy 254SMO
- UNS N08925
- UNS N08926 | Alloy 25-6Mo / Alloy 926
- UNS N08367 | AL-6XN
Alloy 2205 | UNS S32205/S31803 | Duplex 2205
Alloy 2507 | UNS S32750 | Super Duplex 2507
Alloy 310S | UNS S31008 | Stainless Steel 310S (SS 310S)
Alloy 321 | UNS S32100 | Stainless Steel 321 (SS 321)
Alloy 317L | UNS S31703 | Stainless Steel 317L (SS 317L)
Alloy 904L | UNS N08904 | Stainless Steel 904L (SS 904L)

Truss Head Screws Dimensions Table



Dimensions of Hex Bolts
ANSI B 18.2.1-2012
Nominal Size or Basic Product Diameter		E		F			G		H			R		L_T
		Full-size Body Diameter		Width Across Flats			Width Across Corners		Height			Radius of Fillet		Nominal Thread Length for Bolt Lengths
														6 in. and Shorter	Over 6 in.
		Max.	Min.	Basic	Max.	Min.	Max.	Min.	Basic	Max.	Min.	Max.	Min.
1/4	0.2500	0.260	0.237	7/16	0.438	0.425	0.505	0.484	11/64	0.188	0.150	0.03	0.01	0.750	1.000
5/16	0.3125	0.324	0.298	1/2	0.500	0.484	0.577	0.552	7/32	0.235	0.195	0.03	0.01	0.875	1.125
3/8	0.3750	0.388	0.360	9/16	0.562	0.544	0.650	0.620	1/4	0.268	0.226	0.03	0.01	1.000	1.250
1/2	0.4375	0.452	0.421	5/8	0.625	0.603	0.722	0.687	19/64	0.316	0.272	0.03	0.01	1.125	1.375
1/2	0.5000	0.515	0.482	3/4	0.750	0.725	0.866	0.826	11/32	0.364	0.302	0.03	0.01	1.250	1.500
5/8	0.6250	0.642	0.605	15/16	0.938	0.906	1.083	1.033	27/64	0.444	0.378	0.06	0.02	1.500	1.750
3/4	0.7500	0.768	0.729	1-1/8	1.125	1.088	1.299	1.240	1/2	0.524	0.455	0.06	0.02	1.750	2.000
7/8	0.8750	0.895	0.852	1-5/16	1.312	1.269	1.516	1.447	37/64	0.604	0.531	0.06	0.02	2.000	2.250
1	1.0000	1.022	0.976	1-1/2	1.500	1.450	1.732	1.653	43/64	0.700	0.591	0.09	0.03	2.250	2.500
1-1/8	1.1250	1.149	1.098	1-11/16	1.688	1.631	1.949	1.859	3/4	0.780	0.658	0.09	0.03	2.500	2.750
1-1/4	1.2500	1.277	1.223	1-7/8	1.875	1.812	2.165	2.066	27/32	0.876	0.749	0.09	0.03	2.750	3.000
1-3/8	1.3750	1.404	1.345	2-1/16	2.062	1.994	2.382	2.273	29/32	0.940	0.810	0.09	0.03	3.000	3.250
1-1/2	1.5000	1.531	1.470	2-1/4	2.250	2.175	2.598	2.480	1	1.036	0.902	0.09	0.03	3.250	3.500
1-5/8	1.6250	1.658	1.591	2-7/16	2.438	2.356	2.815	2.616	1-3/32	1.116	0.978	0.09	0.03	3.500	3.750
1-3/4	1.7500	1.785	1.716	2-5/8	2.625	2.538	3.031	2.893	1-5/32	1.196	1.054	0.12	0.04	3.750	4.000
1-7/8	1.8750	1.912	1.839	2-13/16	2.812	2.719	3.248	3.099	1-1/4	1.276	1.130	0.12	0.04	4.000	4.250
2	2.0000	2.039	1.964	3	3.000	2.900	3.464	3.306	1-11/32	1.388	1.175	0.12	0.04	4.250	4.500
2-1/4	2.2500	2.305	2.214	3-3/8	3.375	3.262	3.897	3.719	1-1/2	1.548	1.327	0.19	0.06	4.750	5.000
2-1/2	2.5000	2.559	2.461	3-3/4	3.750	3.625	4.330	4.133	1-21/32	1.708	1.479	0.19	0.06	5.250	5.500
2-3/4	2.7500	2.827	2.711	4-1/8	4.125	3.988	4.763	4.546	1-13/16	1.869	1.632	0.19	0.06	5.750	6.000
3	3.0000	3.081	2.961	4-1/2	4.500	4.350	5.196	4.959	2	2.060	1.815	0.19	0.06	6.250	6.500
3-1/4	3.2500	3.335	3.210	4-7/8	4.875	4.712	5.629	5.372	2-3/16	2.251	1.936	0.19	0.06	6.750	7.000
3-1/2	3.5000	3.589	3.461	5-1/4	5.250	5.075	6.062	5.786	2-5/16	2.380	2.057	0.19	0.06	7.250	7.500
3-3/4	3.7500	3.858	3.726	5-5/8	5.625	5.437	6.495	6.198	2-1/2	2.572	2.241	0.19	0.06	7.750	8.000
4	4.0000	4.111	3.975	6	6.000	5.800	6.928	6.612	2-11/16	2.764	2.424	0.19	0.06	8.250	8.500

NOTE: ALL Truss Head 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.

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