Home > Fasteners > Nuts > Hex Nuts > Grade 8M SS Heavy Hex Nut

Choose Favorites List

Zoom In Zoom Out Enlarge

Grade 8M SS Heavy Hex Nut

ASTM A194 Grade 8M heavy hex nuts are manufactured from AISI 316 grade stainless steel and tested to meet ASTM A194 Grade 8M. Dimensional specifications are governed by ASME B18.2.2. Grade markings for A194 Grade 8M heavy hex nuts consists of the number/letter combination of 8M. Grade 8M stainless steel heavy hex nuts are intended for use in high-pressure and/or high-temperature service with ASTM A193 and A320 bolting of similar material, such as B8M and B8M Class 2. Heavy hex nuts provide increased bearing surface area over finished nuts.

Products
Governing Standards
Mechanical Properties
Chemical Properties
Dimensional Specifications

Dimensional Specifications

Dimensional SpecificationsGrade 8M Stainless Steel

Per ASME B18.2.2-2015
Nominal Diameter		UNC	UN8	F			G		H
				Width Across Flats			Width Across Corners		Thickness
				Basic	Max	Min	Max	Min	Basic	Max	Min
1/4	0.250	20		1/2	0.500	0.488	0.577	0.556	15/64	0.250	0.218
5/16	0.313	18		9/16	0.562	0.546	0.650	0.220	19/64	0.314	0.280
3/8	0.375	16		11/16	0.688	0.669	0.794	0.763	23/64	0.377	0.341
7/16	0.438	14		3/4	0.750	0.728	0.866	0.830	27/64	0.441	0.403
1/2	0.500	13		7/8	0.875	0.850	1.010	0.990	31/64	0.504	0.464
9/16	0.563	12		15/16	0.938	0.909	1.083	1.037	35/64	0.568	0.526
5/8	0.625	11		1 1/16	1.062	1.031	1.227	1.175	39/64	0.631	0.587
3/4	0.750	10		1 1/4	0.250	1.212	1.443	1.382	47/64	0.758	0.710
7/8	0.875	9		1 7/16	1.438	1.394	1.660	1.589	55/64	0.885	0.833
1	1.000	8		1 5/8	1.625	1.575	1.876	1.796	63/64	1.012	0.956
1 1/8	1.125	7	8	1 13/16	1.812	1.756	2.093	2.002	1 7/64	1.139	1.079
1 1/4	1.250	7	8	2	2.000	1.380	2.309	2.209	1 7/32	1.251	1.187
1 3/8	1.375	6	8	2 3/16	2.188	2.119	2.526	2.416	1 11/32	1.378	1.310
1 1/2	1.500	6	8	2 3/8	2.375	2.300	2.742	2.622	1 15/32	1.505	1.433
1 5/8	1.625	5 1/2	8	2 9/16	2.562	2.481	2.959	2.828	1 19/32	1.632	1.556
1 3/4	1.750	5	8	2 3/4	2.750	2.662	3.175	3.035	1 23/32	1.759	1.679
1 7/8	1.875	5	8	2 15/16	2.938	2.844	3.392	3.242	1 27/32	1.886	1.802
2	2.000	4 1/2	8	3 1/8	3.125	3.025	3.608	3.449	1 31/32	2.013	1.925
2 1/4	2.250	4 1/2	8	3 1/2	3.500	3.388	4.041	3.862	2 13/64	2.251	2.155
2 1/2	2.500	4	8	3 7/8	3.875	3.750	4.474	4.275	2 29/64	2.505	2.401
2 3/4	2.750	4	8	4 1/4	4.250	4.112	4.907	4.688	2 45/64	2.759	2.647
3	3.000	4	8	4 5/8	4.625	4.475	5.340	5.102	2 61/64	3.013	2.893
3 1/4	3.250	4	8	5	5.000	4.838	5.774	5.515	3 3/16	3.252	3.124
3 1/2	3.500	4	8	5 3/8	5.375	5.200	6.207	5.928	3 7/16	3.506	3.370
3 3/4	3.750	4	8	5 3/4	5.750	5.562	5.562	6.341	3 11/16	3.670	3.616
4	4.000	4	8	6 1/8	6.125	5.925	5.925	6.755	3 15/16	4.014	3.862

All dimensions are in inches.

Grade 8M SS Heavy Hex Nut

of 1

Sort By

Show

View

Diameter	Thread Pitch	Width Across Flats	Height of Nut	Item #	Availability	Price	Quantity
Grade 8M SS Heavy Hex Nut Diameter 1/4 Quantity Discounts	Grade 8M SS Heavy Hex Nut Thread Pitch 20 Quantity Discounts	Grade 8M SS Heavy Hex Nut Width Across Flats 1/2 Quantity Discounts	Grade 8M SS Heavy Hex Nut Height of Nut 0.2344 Quantity Discounts	Grade 8M SS Heavy Hex Nut Item # NH8M0250000-I Quantity Discounts	Grade 8M SS Heavy Hex Nut Availability In Stock Quantity Discounts	Grade 8M SS Heavy Hex Nut Price $0.14016/EA Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts	See Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts
1/4-20 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT $0.14016/EA Qty In Stock Product Detail
Grade 8M SS Heavy Hex Nut Diameter 5/16 Quantity Discounts	Grade 8M SS Heavy Hex Nut Thread Pitch 18 Quantity Discounts	Grade 8M SS Heavy Hex Nut Width Across Flats 9/16 Quantity Discounts	Grade 8M SS Heavy Hex Nut Height of Nut 0.2969 Quantity Discounts	Grade 8M SS Heavy Hex Nut Item # NH8M0310000-I Quantity Discounts	Grade 8M SS Heavy Hex Nut Availability In Stock Quantity Discounts	Grade 8M SS Heavy Hex Nut Price $0.23502/EA Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts	See Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts
5/16-18 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT $0.23502/EA Qty In Stock Product Detail
Grade 8M SS Heavy Hex Nut Diameter 3/8 Quantity Discounts	Grade 8M SS Heavy Hex Nut Thread Pitch 16 Quantity Discounts	Grade 8M SS Heavy Hex Nut Width Across Flats 11/16 Quantity Discounts	Grade 8M SS Heavy Hex Nut Height of Nut 0.3594 Quantity Discounts	Grade 8M SS Heavy Hex Nut Item # NH8M0370000-I Quantity Discounts	Grade 8M SS Heavy Hex Nut Availability In Stock Quantity Discounts	Grade 8M SS Heavy Hex Nut Price $0.30675/EA Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts	See Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts
3/8-16 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT $0.30675/EA Qty In Stock Product Detail
Grade 8M SS Heavy Hex Nut Diameter 7/16 Quantity Discounts	Grade 8M SS Heavy Hex Nut Thread Pitch 14 Quantity Discounts	Grade 8M SS Heavy Hex Nut Width Across Flats 3/4 Quantity Discounts	Grade 8M SS Heavy Hex Nut Height of Nut 0.4219 Quantity Discounts	Grade 8M SS Heavy Hex Nut Item # NH8M0430000-I Quantity Discounts	Grade 8M SS Heavy Hex Nut Availability In Stock Quantity Discounts	Grade 8M SS Heavy Hex Nut Price $0.67046/EA Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts	See Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts
7/16-14 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT $0.67046/EA Qty In Stock Product Detail
Grade 8M SS Heavy Hex Nut Diameter 1/2 Quantity Discounts	Grade 8M SS Heavy Hex Nut Thread Pitch 13 Quantity Discounts	Grade 8M SS Heavy Hex Nut Width Across Flats 7/8 Quantity Discounts	Grade 8M SS Heavy Hex Nut Height of Nut 0.4844 Quantity Discounts	Grade 8M SS Heavy Hex Nut Item # NH8M0500000-I Quantity Discounts	Grade 8M SS Heavy Hex Nut Availability In Stock Quantity Discounts	Grade 8M SS Heavy Hex Nut Price $0.64863/EA Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts	See Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts
1/2-13 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT $0.64863/EA Qty In Stock Product Detail
Grade 8M SS Heavy Hex Nut Diameter 9/16 Quantity Discounts	Grade 8M SS Heavy Hex Nut Thread Pitch 12 Quantity Discounts	Grade 8M SS Heavy Hex Nut Width Across Flats 15/16 Quantity Discounts	Grade 8M SS Heavy Hex Nut Height of Nut 0.5469 Quantity Discounts	Grade 8M SS Heavy Hex Nut Item # NH8M0560000-I Quantity Discounts	Grade 8M SS Heavy Hex Nut Availability In Stock Quantity Discounts	Grade 8M SS Heavy Hex Nut Price $3.7309/EA Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts	See Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts
9/16-12 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT $3.7309/EA Qty In Stock Product Detail
Grade 8M SS Heavy Hex Nut Diameter 5/8 Quantity Discounts	Grade 8M SS Heavy Hex Nut Thread Pitch 11 Quantity Discounts	Grade 8M SS Heavy Hex Nut Width Across Flats 1 1/16 Quantity Discounts	Grade 8M SS Heavy Hex Nut Height of Nut 0.6094 Quantity Discounts	Grade 8M SS Heavy Hex Nut Item # NH8M0620000-I Quantity Discounts	Grade 8M SS Heavy Hex Nut Availability In Stock Quantity Discounts	Grade 8M SS Heavy Hex Nut Price $1.20797/EA Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts	See Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts
5/8-11 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT $1.20797/EA Qty In Stock Product Detail
Grade 8M SS Heavy Hex Nut Diameter 3/4 Quantity Discounts	Grade 8M SS Heavy Hex Nut Thread Pitch 10 Quantity Discounts	Grade 8M SS Heavy Hex Nut Width Across Flats 1 1/4 Quantity Discounts	Grade 8M SS Heavy Hex Nut Height of Nut 0.7344 Quantity Discounts	Grade 8M SS Heavy Hex Nut Item # NH8M0750000-I Quantity Discounts	Grade 8M SS Heavy Hex Nut Availability In Stock Quantity Discounts	Grade 8M SS Heavy Hex Nut Price $2.17871/EA Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts	See Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts
3/4-10 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT $2.17871/EA Qty In Stock Product Detail
Grade 8M SS Heavy Hex Nut Diameter 7/8 Quantity Discounts	Grade 8M SS Heavy Hex Nut Thread Pitch 9 Quantity Discounts	Grade 8M SS Heavy Hex Nut Width Across Flats 1 7/16 Quantity Discounts	Grade 8M SS Heavy Hex Nut Height of Nut 0.8594 Quantity Discounts	Grade 8M SS Heavy Hex Nut Item # NH8M0870000-I Quantity Discounts	Grade 8M SS Heavy Hex Nut Availability In Stock Quantity Discounts	Grade 8M SS Heavy Hex Nut Price $3.46569/EA Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts	See Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts
7/8-9 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT $3.46569/EA Qty In Stock Product Detail
Grade 8M SS Heavy Hex Nut Diameter 1 Quantity Discounts	Grade 8M SS Heavy Hex Nut Thread Pitch 8 Quantity Discounts	Grade 8M SS Heavy Hex Nut Width Across Flats 1 5/8 Quantity Discounts	Grade 8M SS Heavy Hex Nut Height of Nut 0.9844 Quantity Discounts	Grade 8M SS Heavy Hex Nut Item # NH8M1000000-I Quantity Discounts	Grade 8M SS Heavy Hex Nut Availability 3-5 Working Days Quantity Discounts	Grade 8M SS Heavy Hex Nut Price $5.12938/EA Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts	See Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts
1-8 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT $5.12938/EA Qty 3-5 Working Days Product Detail
Grade 8M SS Heavy Hex Nut Diameter 1 1/8 Quantity Discounts	Grade 8M SS Heavy Hex Nut Thread Pitch 7 Quantity Discounts	Grade 8M SS Heavy Hex Nut Width Across Flats 1 13/16 Quantity Discounts	Grade 8M SS Heavy Hex Nut Height of Nut 1.1094 Quantity Discounts	Grade 8M SS Heavy Hex Nut Item # NH8M112NC00-I Quantity Discounts	Grade 8M SS Heavy Hex Nut Availability In Stock Quantity Discounts	Grade 8M SS Heavy Hex Nut Price $8.53702/EA Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts	See Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts
1 1/8-7 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT $8.53702/EA Qty In Stock Product Detail
Grade 8M SS Heavy Hex Nut Diameter 1 1/8 Quantity Discounts	Grade 8M SS Heavy Hex Nut Thread Pitch 8 Quantity Discounts	Grade 8M SS Heavy Hex Nut Width Across Flats 1 13/16 Quantity Discounts	Grade 8M SS Heavy Hex Nut Height of Nut 1.1094 Quantity Discounts	Grade 8M SS Heavy Hex Nut Item # NH8M1120000-I Quantity Discounts	Grade 8M SS Heavy Hex Nut Availability In Stock Quantity Discounts	Grade 8M SS Heavy Hex Nut Price $8.81544/EA Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts	See Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts
1 1/8-8 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT $8.81544/EA Qty In Stock Product Detail
Grade 8M SS Heavy Hex Nut Diameter 1 1/4 Quantity Discounts	Grade 8M SS Heavy Hex Nut Thread Pitch 7 Quantity Discounts	Grade 8M SS Heavy Hex Nut Width Across Flats 2 Quantity Discounts	Grade 8M SS Heavy Hex Nut Height of Nut 1.2188 Quantity Discounts	Grade 8M SS Heavy Hex Nut Item # NH8M125NC00-I Quantity Discounts	Grade 8M SS Heavy Hex Nut Availability In Stock Quantity Discounts	Grade 8M SS Heavy Hex Nut Price $11.41011/EA Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts	See Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts
1 1/4-7 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT $11.41011/EA Qty In Stock Product Detail
Grade 8M SS Heavy Hex Nut Diameter 1 1/4 Quantity Discounts	Grade 8M SS Heavy Hex Nut Thread Pitch 8 Quantity Discounts	Grade 8M SS Heavy Hex Nut Width Across Flats 2 Quantity Discounts	Grade 8M SS Heavy Hex Nut Height of Nut 1.2188 Quantity Discounts	Grade 8M SS Heavy Hex Nut Item # NH8M1250000-I Quantity Discounts	Grade 8M SS Heavy Hex Nut Availability In Stock Quantity Discounts	Grade 8M SS Heavy Hex Nut Price $17.63572/EA Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts	See Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts
1 1/4-8 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT $17.63572/EA Qty In Stock Product Detail
Grade 8M SS Heavy Hex Nut Diameter 1 3/8 Quantity Discounts	Grade 8M SS Heavy Hex Nut Thread Pitch 8 Quantity Discounts	Grade 8M SS Heavy Hex Nut Width Across Flats 2 3/16 Quantity Discounts	Grade 8M SS Heavy Hex Nut Height of Nut 1.3438 Quantity Discounts	Grade 8M SS Heavy Hex Nut Item # NH8M1370000-I Quantity Discounts	Grade 8M SS Heavy Hex Nut Availability In Stock Quantity Discounts	Grade 8M SS Heavy Hex Nut Price $15.8577/EA Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts	See Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts
1 3/8-8 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT $15.8577/EA Qty In Stock Product Detail
Grade 8M SS Heavy Hex Nut Diameter 1 1/2 Quantity Discounts	Grade 8M SS Heavy Hex Nut Thread Pitch 6 Quantity Discounts	Grade 8M SS Heavy Hex Nut Width Across Flats 2 3/8 Quantity Discounts	Grade 8M SS Heavy Hex Nut Height of Nut 1.4688 Quantity Discounts	Grade 8M SS Heavy Hex Nut Item # NH8M150NC00-I Quantity Discounts	Grade 8M SS Heavy Hex Nut Availability In Stock Quantity Discounts	Grade 8M SS Heavy Hex Nut Price $10.81081/EA Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts	See Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts
1 1/2-6 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT $10.81081/EA Qty In Stock Product Detail
Grade 8M SS Heavy Hex Nut Diameter 1 1/2 Quantity Discounts	Grade 8M SS Heavy Hex Nut Thread Pitch 8 Quantity Discounts	Grade 8M SS Heavy Hex Nut Width Across Flats 2 3/8 Quantity Discounts	Grade 8M SS Heavy Hex Nut Height of Nut 1.4688 Quantity Discounts	Grade 8M SS Heavy Hex Nut Item # NH8M1500000-I Quantity Discounts	Grade 8M SS Heavy Hex Nut Availability In Stock Quantity Discounts	Grade 8M SS Heavy Hex Nut Price $13.71234/EA Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts	See Quantity Discounts	Grade 8M SS Heavy Hex Nut Unit of Measure EA Quantity Discounts
1 1/2-8 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT $13.71234/EA Qty In Stock Product Detail

ASTM A194	This specification covers a variety of carbon, alloy, and martensitic stainless steel nuts in the size range 1⁄4 through 4 in. and metric M6 through M100 nominal. It also covers austenitic stainless steel nuts in the size range 1⁄4 in. and M6 nominal and above. These nuts are intended for high-pressure or high temperature service, or both. Grade substitutions without the purchaser’s permission are not allowed.
ASME B18.2.2	Covers the complete general and dimensional data for the various types of inch series square and hex nuts, including machine screw nuts and coupling nuts.
ASME B1.1 UNC & UNF Class 2B	Specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads.

Stainless AISI 316	Per ASTM A194/A194M-16
Diameter	Proof Load Stress	Core Hardness
Diameter	Min psi	Rockwell
1/4" thru 4"	80,000	C32 max

Per ASTM A194/A194M-16
Grade	Material	Carbon	Manganese	Phosphorus	Sulfur (1)	Silicon	Chromium	Nickel	Molybdenum
Grade	Material	% by weight	% by weight	% by weight	% by weight	% by weight	% by weight	% by weight	% by weight
8M	Type 316 Stainless Steel	0.08 max	2.00 max	0.045 max	0.030 max	1.00 max	16.0-18.0	10.0-14.0	2.00-3.00

Grade 8M SS Heavy Hex Nut

Technical Data

Governing Standards

Governing StandardsGrade 8M Stainless Steel

Mechanical Properties

Mechanical PropertiesGrade 8M Stainless Steel

Chemical Properties

Chemical PropertiesGrade 8M Stainless Steel

Dimensional Specifications

Dimensional SpecificationsGrade 8M Stainless Steel

Grade

Diameter

Thread Pitch

Thread Type

Width Across Flats

1/4-20 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT

5/16-18 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT

3/8-16 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT

7/16-14 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT

1/2-13 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT

9/16-12 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT

5/8-11 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT

3/4-10 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT

7/8-9 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT

1-8 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT

1 1/8-7 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT

1 1/8-8 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT

1 1/4-7 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT

1 1/4-8 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT

1 3/8-8 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT

1 1/2-6 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT

1 1/2-8 A194 GRADE 8M STAINLESS STEEL HEAVY HEX NUT