Duplex 2205 (S31803) Hex Nuts

HASM is an ISO 9001:2015, AS9100D and ISO 14001:2015 certified manufacturer and worldwide supplier of standard & custom Duplex 2205 (S31803) hex nuts. We also manufacture hex nuts 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 Hex Nuts. Materials include: Hastelloy, Inconel, Duplex, Super Duplex, Monel and Titanium. Use our convenient Request a Quote for quick delivery.

HASM Duplex 2205 (S31803) Hex Nuts and Hex Jam Nuts are manufactured by the cold heading and hot forming technologies in nominal diameters ranging from 1/8”- 3” (M3 – M80). We offer Duplex 2205 (S31803) hex nuts 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 fasteners in our product warehouse, which enables HASM to select, package and expedite your hex nut order quickly.

We are globally recognized as the emerging leader of high-quality, Duplex 2205 (S31803) fasteners and are proud to serve our distributors, EPCs, OEM and MRO customers worldwide.

HASM Duplex 2205 (S31803) hex nuts 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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Dimensions of Duplex 2205 (S31803) Hex Nuts and Hex Jam Nuts Table

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Dimensions of Hex Nuts and Hex Jam Nuts
ANSI B 18.2.2-2010
Nominal Size	Basic Major Diameter of Thread	F		G		H		H₁		Maximum Runout of Bearing Surface to Thread Axis, FIM	Maximum Runout of Bearing Surface to Thread Axis, FIM	Maximum Runout of Bearing Surface to Thread Axis, FIM
		Width Across Flats		Width Across Corners		Thickness Hex Nuts		Thickness Jam Nuts		Hex Nuts		Hex Jam Nuts
		Min.	Max.	Min.	Max.	Min.	Max.	Min.	Max.	Specified Proof Load
										Up to 150,000 psi	150,000 psi and Greater	All Strength Levels
1/4	0.2500	0.428	0.438	0.488	0.505	0.212	0.226	0.150	0.163	0.015	0.010	0.015
5/16	0.3125	0.489	0.500	0.557	0.577	0.258	0.273	0.180	0.195	0.016	0.011	0.016
3/8	0.3750	0.551	0.563	0.628	0.650	0.320	0.337	0.210	0.227	0.017	0.012	0.017
7/16	0.4375	0.675	0.688	0.768	0.794	0.365	0.385	0.240	0.260	0.018	0.013	0.018
1/2	0.5000	0.736	0.750	0.840	0.866	0.427	0.448	0.302	0.323	0.019	0.014	0.019
9/16	0.5625	0.861	0.875	0.982	1.010	0.473	0.496	0.301	0.324	0.020	0.015	0.020
5/8	0.6250	0.922	0.938	1.051	1.083	0.535	0.559	0.363	0.387	0.021	0.016	0.021
3/4	0.7500	1.088	1.125	1.240	1.299	0.617	0.665	0.398	0.446	0.023	0.018	0.023
7/8	0.8750	1.269	1.312	1.447	1.516	0.724	0.776	0.458	0.510	0.025	0.020	0.025
1	1.0000	1.450	1.500	1.653	1.732	0.831	0.887	0.519	0.575	0.027	0.022	0.027
1-1/8	1.1250	1.631	1.688	1.859	1.949	0.939	0.999	0.579	0.639	0.030	0.025	0.030
1-1/4	1.2500	1.812	1.875	2.066	2.165	1.030	1.094	0.687	0.751	0.033	0.028	0.033
1-3/8	1.3750	1.994	2.062	2.273	2.382	1.138	1.206	0.747	0.815	0.036	0.031	0.036
1-1/2	1.5000	2.175	2.250	2.480	2.598	1.245	1.317	0.808	0.880	0.039	0.034	0.039
1-5/8	1.6250	2.35	2.43	2.679	2.805	1.364	1.416	0.868	0.944	0.044	0.038	0.044
1-3/4	1.7500	2.538	2.625	2.893	3.031	1.460	1.540	0.929	1.009	0.048	0.041	0.048
1-7/8	1.8750	2.722	2.813	3.103	3.247	1.567	1.651	0.989	1.073	0.051	0.044	0.051
2	2.0000	2.900	3.000	3.306	3.464	1.675	1.763	1.050	1.138	0.055	0.047	0.055
2-1/4	2.2500	3.263	3.375	3.719	3.897	1.890	1.986	1.155	1.267	0.061	0.052	0.061
2-1/2	2.5000	3.625	3.750	4.133	4.330	2.105	2.209	1.401	1.427	0.068	0.058	0.068
2-3/4	2.7500	3.998	4.125	4.546	4.763	2.319	2.431	1.522	1.556	0.074	0.064	0.074
3	3.0000	4.350	4.500	4.959	5.196	2.534	2.654	1.643	1.685	0.081	0.070	0.081
3-1/4	3.2500	4.713	4.875	5.373	5.629	2.749	2.877	1.748	1.814	0.087	0.075	0.087
3-1/2	3.5000	5.075	5.250	5.786	6.062	2.964	3.100	1.870	1.943	0.094	0.081	0.094
3-3/4	3.7500	5.438	5.625	6.199	6.495	3.178	3.322	1.990	2.072	0.100	0.087	0.100
4	4.0000	5.800	6.000	6.612	6.928	3.393	3.545	2.112	2.201	0.107	0.093	0.107

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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Duplex 2205 (S31803) Heavy Hex Nuts and Heavy Hex Jam Nuts

HASM is an ISO 9001:2015, AS9100D and ISO 14001:2015 certified manufacturer and worldwide supplier of standard & custom Duplex 2205 (S31803) heavy hex nuts and heavy hex jam nuts. We also manufacture heavy hex nuts 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 Duplex 2205 (S31803) Heavy Hex Nuts and Heavy Hex Jam Nuts are manufactured by the cold heading and hot forming technologies in nominal diameters ranging from 1/8”- 3” (M3 – M80). We offer Duplex 2205 (S31803) fasteners in both USCS/Imperial and metric sizes.

We are globally recognized as the emerging leader of high-quality, Duplex 2205 (S31803) fasteners and are proud to serve our distributors, EPCs, OEM and MRO customers worldwide.

HASM Duplex 2205 (S31803) fasteners meet applicable ASTM, ANSI, ASME, SAE, API, NAS, AN, MS, NACE, ISO, DIN, and KS standards.

Heavy Hex Nuts Dimensions Table

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Dimensions of Heavy Hex Nuts and Heavy Hex Jam Nuts
ANSI B 18.2.2-2010
Nominal Size	Basic Major Diameter of Thread	F			G		H			H₁			Maximum Runout of Bearing Surface to Thread Axis, FIM
		Width Across Flats			Width Across Corners		Thickness Heavy Hex Nuts			Thickness Heavy Hex Jam Nuts			Heavy Hex Nuts		Heavy Hex Jam Nuts
													Specified Proof Load
		Basic	Min.	Max.	Min.	Max.	Basic	Min.	Max.	Basic	Min.	Max.	Up to 150,000 psi	150,000 psi and Greater	All Strength Levels
1/4	0.2500	1/2	0.488	0.500	0.556	0.577	15/64	0.218	0.250	11/64	0.156	0.188	0.017	0.011	0.017
5/16	0.3125	9/16	0.546	0.562	0.622	0.650	19/64	0.280	0.314	13/64	0.186	0.220	0.020	0.012	0.020
3/8	0.3750	11/16	0.669	0.688	0.763	0.794	23/64	0.341	0.377	15/64	0.216	0.252	0.021	0.014	0.021
7/16	0.4375	3/4	0.728	0.750	0.830	0.866	27/64	0.403	0.441	17/64	0.247	0.285	0.022	0.015	0.022
1/2	0.5000	7/8	0.850	0.875	0.969	1.010	31/64	0.464	0.504	19/64	0.277	0.317	0.023	0.016	0.023
9/16	0.5625	15/16	0.909	0.938	1.037	1.083	35/64	0.526	0.568	21/64	0.307	0.349	0.024	0.017	0.024
5/16	0.6250	1-1/16	1.031	1.062	1.175	1.227	39/64	0.587	0.631	23/64	0.337	0.381	0.025	0.018	0.025
3/4	0.7500	1-1/4	1.212	1.250	1.382	1.443	47/64	0.710	0.758	27/64	0.398	0.446	0.027	0.020	0.027
7/8	0.8750	1-7/16	1.394	1.438	1.589	1.660	55/64	0.833	0.885	31/64	0.458	0.510	0.029	0.022	0.029
1	1.0000	1-5/8	1.575	1.625	1.796	1.876	63/64	0.956	1.012	35/64	0.519	0.575	0.031	0.024	0.031
1-1/8	1.1250	1-13/16	1.756	1.812	2.002	2.093	1-7/64	1.079	1.139	39/64	0.579	0.639	0.033	0.027	0.033
1-1/4	1.2500	2	1.938	2.000	2.209	2.309	1-7/32	1.187	1.251	23/32	0.687	0.751	0.035	0.030	0.035
1-3/8	1.3750	2-3/16	2.119	2.188	2.416	2.526	1-11/32	1.310	1.378	25/32	0.747	0.815	0.038	0.033	0.038
1-1/2	1.5000	2-3/8	2.300	2.375	2.622	2.742	1-15/32	1.433	1.505	27/32	0.808	0.880	0.041	0.036	0.041
1-5/8	1.6250	2-9/16	2.481	2.562	2.828	2.959	1-19/32	1.556	1.632	29/32	0.868	0.944	0.044	0.038	0.044
1-3/4	1.7500	2-3/4	2.662	2.750	3.035	3.175	1-23/32	1.679	1.759	31/32	0.929	1.009	0.048	0.041	0.048
1-7/8	1.8750	2-15/16	2.844	2.938	3.242	3.392	1-27/32	1.802	1.886	1-1/32	0.989	1.073	0.051	0.044	0.051
2	2.0000	3-1/8	3.025	3.125	3.449	3.608	1-31/32	1.925	2.013	1-3/32	1.050	1.138	0.055	0.047	0.055
2-1/4	2.2500	3-1/2	3.388	3.500	3.862	4.041	2-13/64	2.155	2.251	1-13/64	1.155	1.251	0.061	0.052	0.061
2-1/2	2.5000	3-7/8	3.750	3.875	4.275	4.474	2-29/64	2.401	2.505	1-29/64	1.401	1.505	0.068	0.058	0.068
2-3/4	2.7500	4-1/4	4.112	4.250	4.688	4.907	2-45/64	2.647	2.759	1-37/64	1.522	1.634	0.074	0.064	0.074
3	3.0000	4-5/8	4.475	4.625	5.102	5.340	2-61/64	2.893	3.013	1-45/64	1.643	1.763	0.081	0.070	0.081
3-1/4	3.2500	5	4.838	5.000	5.515	5.774	3-3/16	3.124	3.252	1-13/16	1.748	1.876	0.087	0.075	0.087
3-1/4	3.5000	5-3/8	5.200	5.375	5.928	6.207	3-7/16	3.370	3.506	1-15/16	1.870	2.006	0.094	0.081	0.094
3-3/4	3.7500	5-3/4	5.562	5.750	6.341	6.640	3-11/16	3.616	3.760	2-1/16	1.990	2.134	0.100	0.087	0.100
4	4.0000	6-1/4	5.925	6.125	6.755	7.073	3-15/16	3.862	4.014	2-3/16	2.112	2.264	0.107	0.093	0.107

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