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Extreme-Strength Steel Heavy Hex Nuts—Grade 2H


Because they’re about 10% wider and taller than standard hex nuts, these heavy hex nuts distribute the load over a large area. Grade 2H nuts are comparable in strength to Grade 9 bolts. They're about 20% stronger than high-strength steel nuts and are used in heavy machinery, such as earth-moving equipment.
Zinc yellow-chromate plated steel nuts resist corrosion in wet environments.
Hot-dipped galvanized steel nuts have a thick coating for better corrosion resistance than zinc-plated steel nuts. They must be used with other hot-dipped galvanized fasteners.
Black-oxide steel nuts have a dark surface color and are mildly corrosion resistant in dry environments.
Blue PTFE-coated steel nuts have a slippery surface to resist sticking during installation. They're resistant to chemicals and salt water.
For technical drawings and 3-D models, click on a part number.
Thread Size | Wd. | Ht. | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc Yellow-Chromate Plated Steel—ASTM Grade 2H | ||||||
---|---|---|---|---|---|---|
1/4"-20 | 1/2" | 15/64" | ASME B18.2.2, ASTM A194 | 100 | 000000000 | 000000 |
1/4"-28 | 1/2" | 15/64" | ASME B18.2.2, ASTM A194 | 50 | 000000000 | 00000 |
5/16"-18 | 9/16" | 19/64" | ASME B18.2.2, ASTM A194 | 50 | 000000000 | 0000 |
5/16"-24 | 9/16" | 19/64" | ASME B18.2.2, ASTM A194 | 25 | 000000000 | 0000 |
3/8"-16 | 11/16" | 23/64" | ASME B18.2.2, ASTM A194 | 50 | 000000000 | 00000 |
3/8"-24 | 11/16" | 23/64" | ASME B18.2.2, ASTM A194 | 25 | 000000000 | 00000 |
1/2"-13 | 7/8" | 31/64" | ASME B18.2.2, ASTM A194 | 25 | 000000000 | 00000 |
1/2"-20 | 7/8" | 31/64" | ASME B18.2.2, ASTM A194 | 10 | 000000000 | 0000 |
5/8"-11 | 1 1/16" | 39/64" | ASME B18.2.2, ASTM A194 | 10 | 000000000 | 00000 |
5/8"-18 | 1 1/16" | 39/64" | ASME B18.2.2, ASTM A194 | 10 | 000000000 | 00000 |
3/4"-10 | 1 1/4" | 47/64" | ASME B18.2.2, ASTM A194 | 10 | 000000000 | 00000 |
3/4"-16 | 1 1/4" | 47/64" | ASME B18.2.2, ASTM A194 | 10 | 000000000 | 00000 |
1"-8 | 1 5/8" | 63/64" | ASME B18.2.2, ASTM A194 | 5 | 000000000 | 00000 |
1"-14 | 1 5/8" | 63/64" | ASME B18.2.2, ASTM A194 | 1 | 000000000 | 0000 |
Hot-Dipped Galvanized Steel—ASTM Grade 2H | ||||||
1/4"-20 | 1/2" | 15/64" | ASTM A194 | 50 | 000000000 | 00000 |
3/8"-16 | 11/16" | 23/64" | ASTM A194 | 50 | 000000000 | 00000 |
1/2"-13 | 7/8" | 31/64" | ASTM A194 | 25 | 000000000 | 00000 |
5/8"-11 | 1 1/16" | 39/64" | ASTM A194 | 10 | 000000000 | 00000 |
3/4"-10 | 1 1/4" | 47/64" | ASTM A194 | 10 | 000000000 | 00000 |
7/8"-9 | 1 7/16" | 55/64" | ASTM A194 | 5 | 000000000 | 00000 |
1"-8 | 1 5/8" | 63/64" | ASTM A194 | 5 | 000000000 | 00000 |
1 1/8"-7 | 1 13/16" | 1 7/64" | ASTM A194 | 1 | 000000000 | 0000 |
1 1/8"-8 | 1 13/16" | 1 7/64" | ASTM A194 | 1 | 000000000 | 0000 |
1 1/4"-7 | 2" | 1 7/32" | ASTM A194 | 1 | 000000000 | 0000 |
1 1/4"-8 | 2" | 1 7/32" | ASTM A194 | 1 | 000000000 | 0000 |
1 3/8"-6 | 2 3/16" | 1 11/32" | ASTM A194 | 1 | 000000000 | 0000 |
1 1/2"-6 | 2 3/8" | 1 15/32" | ASTM A194 | 1 | 000000000 | 00000 |
1 3/4"-5 | 2 3/4" | 1 23/32" | ASTM A194 | 1 | 000000000 | 00000 |
2"-4 1/2 | 3 1/8" | 1 31/32" | ASTM A194 | 1 | 000000000 | 00000 |
Black-Oxide Steel—ASTM Grade 2H | ||||||
1/4"-20 | 1/2" | 15/64" | ASTM A194 | 25 | 000000000 | 00000 |
5/16"-18 | 9/16" | 19/64" | ASTM A194 | 10 | 000000000 | 0000 |
3/8"-16 | 11/16" | 23/64" | ASTM A194 | 10 | 000000000 | 0000 |
7/16"-14 | 3/4" | 27/64" | ASTM A194 | 10 | 000000000 | 0000 |
1/2"-13 | 7/8" | 31/64" | ASTM A194 | 10 | 000000000 | 0000 |
5/8"-11 | 1 1/16" | 39/64" | ASTM A194 | 5 | 000000000 | 0000 |
3/4"-10 | 1 1/4" | 47/64" | ASTM A194 | 5 | 000000000 | 0000 |
7/8"-9 | 1 7/16" | 55/64" | ASTM A194 | 1 | 000000000 | 0000 |
1"-8 | 1 5/8" | 63/64" | ASTM A194 | 1 | 000000000 | 0000 |
Blue PTFE-Coated Steel—ASTM Grade 2H | ||||||
1/2"-13 | 7/8" | 31/64" | ASTM A194 | 25 | 000000000 | 00000 |
5/8"-11 | 1 1/16" | 39/64" | ASTM A194 | 10 | 000000000 | 00000 |
3/4"-10 | 1 1/4" | 47/64" | ASTM A194 | 10 | 000000000 | 00000 |
7/8"-9 | 1 7/16" | 55/64" | ASTM A194 | 5 | 000000000 | 00000 |
1"-8 | 1 5/8" | 63/64" | ASTM A194 | 5 | 000000000 | 00000 |
1 1/8"-8 | 1 13/16" | 1 7/64" | ASTM A194 | 1 | 000000000 | 0000 |
1 1/4"-8 | 2" | 1 7/32" | ASTM A194 | 1 | 000000000 | 00000 |
1 3/8"-8 | 2 3/16" | 1 11/32" | ASTM A194 | 1 | 000000000 | 00000 |
1 1/2"-8 | 2 3/8" | 1 15/32" | ASTM A194 | 1 | 000000000 | 00000 |
1 3/4"-8 | 2 3/4" | 1 23/32" | ASTM A194 | 1 | 000000000 | 00000 |
1 7/8"-8 | 2 15/16" | 1 27/32" | ASTM A194 | 1 | 000000000 | 00000 |
2"-8 | 3 1/8" | 1 31/32" | ASTM A194 | 1 | 000000000 | 00000 |
Steel—ASTM Grade 2H | ||||||
1/4"-20 | 1/2" | 15/64" | ASTM A194 | 100 | 000000000 | 00000 |
1/4"-28 | 1/2" | 15/64" | ASME B18.2.2, ASTM A194 | 50 | 000000000 | 00000 |
5/16"-18 | 9/16" | 19/64" | ASTM A194 | 50 | 000000000 | 00000 |
5/16"-24 | 9/16" | 19/64" | ASME B18.2.2, ASTM A194 | 50 | 000000000 | 00000 |
3/8"-16 | 11/16" | 23/64" | ASTM A194 | 50 | 000000000 | 00000 |
3/8"-24 | 11/16" | 23/64" | ASME B18.2.2, ASTM A194 | 25 | 000000000 | 0000 |
7/16"-14 | 3/4" | 27/64" | ASTM A194 | 25 | 000000000 | 00000 |
7/16"-20 | 3/4" | 27/64" | ASME B18.2.2, ASTM A194 | 25 | 000000000 | 00000 |
1/2"-13 | 7/8" | 31/64" | ASTM A194 | 25 | 000000000 | 00000 |
1/2"-20 | 7/8" | 31/64" | ASME B18.2.2, ASTM A194 | 25 | 000000000 | 00000 |
9/16"-12 | 15/16" | 35/64" | ASME B18.2.2, ASTM A194 | 10 | 000000000 | 0000 |
5/8"-11 | 1 1/16" | 39/64" | ASTM A194 | 10 | 000000000 | 00000 |
5/8"-18 | 1 1/16" | 39/64" | ASME B18.2.2, ASTM A194 | 25 | 000000000 | 00000 |
3/4"-10 | 1 1/4" | 47/64" | ASTM A194 | 10 | 000000000 | 00000 |
3/4"-16 | 1 1/4" | 47/64" | ASME B18.2.2, ASTM A194 | 10 | 000000000 | 00000 |
7/8"-9 | 1 7/16" | 55/64" | ASTM A194 | 10 | 000000000 | 00000 |
7/8"-14 | 1 7/16" | 55/64" | ASME B18.2.2, ASTM A194 | 10 | 000000000 | 00000 |
1"-8 | 1 5/8" | 63/64" | ASTM A194 | 5 | 000000000 | 00000 |
1"-12 | 1 5/8" | 63/64" | ASME B18.2.2, ASTM A194 | 1 | 000000000 | 0000 |
1"-14 | 1 5/8" | 63/64" | ASME B18.2.2, ASTM A194 | 5 | 000000000 | 00000 |
1 1/8"-7 | 1 13/16" | 1 7/64" | ASTM A194 | 1 | 000000000 | 0000 |
1 1/8"-8 | 1 13/16" | 1 7/64" | ASTM A194 | 1 | 000000000 | 0000 |
1 1/8"-12 | 1 13/16" | 1 7/64" | ASME B18.2.2, ASTM A194 | 1 | 000000000 | 0000 |
1 1/4"-7 | 2" | 1 7/32" | ASTM A194 | 1 | 000000000 | 0000 |
1 1/4"-8 | 2" | 1 7/32" | ASTM A194 | 1 | 000000000 | 0000 |
1 1/4"-12 | 2" | 1 7/32" | ASME B18.2.2, ASTM A194 | 1 | 000000000 | 0000 |
1 3/8"-6 | 2 3/16" | 1 11/32" | ASME B18.2.2, ASTM A194 | 1 | 000000000 | 0000 |
1 3/8"-8 | 2 3/16" | 1 11/32" | ASTM A194 | 1 | 000000000 | 0000 |
1 3/8"-12 | 2 3/16" | 1 11/32" | ASME B18.2.2, ASTM A194 | 1 | 000000000 | 0000 |
1 1/2"-6 | 2 3/8" | 1 15/32" | ASTM A194 | 1 | 000000000 | 0000 |
1 1/2"-8 | 2 3/8" | 1 15/32" | ASTM A194 | 1 | 000000000 | 0000 |
1 1/2"-12 | 2 3/8" | 1 15/32" | ASTM A194 | 1 | 000000000 | 0000 |
1 5/8"-8 | 2 9/16" | 1 19/32" | ASME B18.2.2, ASTM A194 | 1 | 000000000 | 0000 |
1 3/4"-5 | 2 3/4" | 1 23/32" | ASTM A194 | 1 | 000000000 | 00000 |
1 3/4"-8 | 2 3/4" | 1 23/32" | ASTM A194 | 1 | 000000000 | 00000 |
1 7/8"-8 | 2 15/16" | 1 27/32" | ASME B18.2.2, ASTM A194 | 1 | 000000000 | 00000 |
2"-4 1/2 | 3 1/8" | 1 31/32" | ASTM A194 | 1 | 000000000 | 00000 |
2"-8 | 3 1/8" | 1 31/32" | ASTM A194 | 1 | 000000000 | 00000 |
2 1/4"-4 1/2 | 3 1/2" | 2 13/64" | ASME B18.2.2, ASTM A194 | 1 | 000000000 | 00000 |
2 1/4"-8 | 3 1/2" | 2 13/64" | ASME B18.2.2, ASTM A194 | 1 | 000000000 | 00000 |
2 1/2"-4 | 3 7/8" | 2 29/64" | ASME B18.2.2, ASTM A194 | 1 | 000000000 | 00000 |
Metric Extreme-Strength Steel Heavy Hex Nuts—Grade 2H


About 10% wider and taller than standard hex nuts, these metric-sized heavy hex nuts distribute the load over a large area. Grade 2H nuts are comparable in strength to Class 12.9 bolts. They're about 20% stronger than high-strength steel nuts and are used in heavy machinery, such as earth-moving equipment.
Fine threads are closely spaced to prevent loosening from vibration.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||||
---|---|---|---|---|---|---|---|---|
Size | Pitch, mm | Spacing | Wd., mm | Ht., mm | Specifications Met | Pkg. Qty. | Pkg. | |
Steel—ASTM Grade 2H | ||||||||
M10 | 1.5 | Coarse | 19 | 12 | ASTM A194 | 5 | 000000000 | 00000 |
M12 | 1.75 | Coarse | 21 | 12 | ASTM A194, DIN 6915 | 5 | 000000000 | 0000 |
M14 | 2 | Coarse | 24 | 14 | ASTM A194, DIN 6915 | 5 | 000000000 | 0000 |
M16 | 2 | Coarse | 27 | 17 | ASTM A194, DIN 6915 | 5 | 000000000 | 0000 |
M18 | 2.5 | Coarse | 30 | 19 | ASTM A194, DIN 6915 | 5 | 000000000 | 00000 |
M20 | 2.5 | Coarse | 33 | 20 | ASTM A194, DIN 6915 | 5 | 000000000 | 00000 |
M22 | 2.5 | Coarse | 36 | 23 | ASTM A194, DIN 6915 | 1 | 000000000 | 0000 |
M24 | 3 | Coarse | 41 | 24 | ASTM A194, DIN 6915 | 1 | 000000000 | 0000 |
M27 | 3 | Coarse | 46 | 27 | ASTM A194, DIN 6915 | 1 | 000000000 | 0000 |
M30 | 3.5 | Coarse | 50 | 30 | ASTM A194, DIN 6915 | 1 | 000000000 | 00000 |
M33 | 3.5 | Coarse | 55 | 33 | ASTM A194, DIN 6915 | 1 | 000000000 | 00000 |
M36 | 3 | Fine | 60 | 36 | ASTM A194, DIN 6915 | 1 | 000000000 | 00000 |
M36 | 4 | Coarse | 60 | 36 | ASTM A194, DIN 6915 | 1 | 000000000 | 00000 |
M39 | 4 | Coarse | 65 | 39 | ASTM A194 | 1 | 000000000 | 00000 |
M42 | 3 | Fine | 70 | 39 | ASTM A194 | 1 | 000000000 | 00000 |
M42 | 4.5 | Coarse | 70 | 42 | ASTM A194 | 1 | 000000000 | 00000 |
M45 | 4.5 | Coarse | 75 | 45 | ASTM A194 | 1 | 000000000 | 00000 |
M48 | 3 | Fine | 80 | 48 | ASTM A194 | 1 | 000000000 | 00000 |
M48 | 5 | Coarse | 80 | 48 | ASTM A194 | 1 | 000000000 | 00000 |
M52 | 5 | Coarse | 85 | 52 | ASTM A194 | 1 | 000000000 | 00000 |
M56 | 5.5 | Coarse | 90 | 56 | ASTM A194 | 1 | 000000000 | 00000 |
M64 | 6 | Coarse | 100 | 64 | ASTM A194 | 1 | 000000000 | 00000 |
Extreme-Strength Steel Thin Heavy Hex Nuts—Grade 2H


Also known as heavy jam nuts, these are about half the height and 10% wider than standard hex nuts. Use them in low-clearance applications or jam one against another heavy hex nut to hold it in place. They're often used in conjunction with a heavy hex nut to fasten Grade 9 bolts in heavy machinery, such as earth-moving equipment.
Zinc-plated steel nuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
Thread Size | Wd. | Ht. | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—ASTM Grade 2H | ||||||
---|---|---|---|---|---|---|
1/4"-20 | 1/2" | 11/64" | ASME B18.2.2, ASTM A194 | 5 | 000000000 | 000000 |
5/16"-18 | 9/16" | 13/64" | ASME B18.2.2, ASTM A194 | 5 | 000000000 | 00000 |
3/8"-16 | 11/16" | 15/64" | ASME B18.2.2, ASTM A194 | 5 | 000000000 | 00000 |
1/2"-13 | 7/8" | 19/64" | ASME B18.2.2, ASTM A194 | 5 | 000000000 | 00000 |
5/8"-11 | 1 1/16" | 23/64" | ASME B18.2.2, ASTM A194 | 5 | 000000000 | 00000 |
3/4"-10 | 1 1/4" | 27/64" | ASME B18.2.2 | 5 | 000000000 | 00000 |
Steel—ASTM Grade 2H | ||||||
1/4"-20 | 1/2" | 11/64" | ASME B18.2.2 | 1 | 000000000 | 0000 |
3/8"-16 | 11/16" | 15/64" | ASME B18.2.2 | 5 | 000000000 | 00000 |
7/16"-14 | 3/4" | 17/64" | ASME B18.2.2 | 1 | 000000000 | 0000 |
1/2"-13 | 7/8" | 19/64" | ASME B18.2.2 | 5 | 000000000 | 00000 |
5/8"-11 | 1 1/16" | 23/64" | ASME B18.2.2 | 1 | 000000000 | 0000 |
3/4"-10 | 1 1/4" | 27/64" | ASME B18.2.2 | 1 | 000000000 | 0000 |
7/8"-9 | 1 7/16" | 31/64" | ASME B18.2.2 | 1 | 000000000 | 0000 |
1"-8 | 1 5/8" | 35/64" | ASME B18.2.2 | 1 | 000000000 | 0000 |
1 1/8"-7 | 1 13/16" | 39/64" | ASME B18.2.2 | 1 | 000000000 | 0000 |
1 1/4"-7 | 2" | 23/32" | ASME B18.2.2 | 1 | 000000000 | 0000 |
1 3/8"-6 | 2 3/16" | 25/32" | ASME B18.2.2 | 1 | 000000000 | 0000 |
1 1/2"-6 | 2 3/8" | 27/32" | ASME B18.2.2 | 1 | 000000000 | 0000 |
1 3/4"-5 | 2 3/4" | 31/32" | ASME B18.2.2 | 1 | 000000000 | 00000 |
2"-4 1/2 | 3 1/8" | 1 3/32" | ASME B18.2.2 | 1 | 000000000 | 00000 |
Extreme-Strength Steel Coupling Nuts

Also known as extension nuts, use these to connect and extend threaded rods. Made from Grade 2H steel, they're about 20% stronger than high-strength steel coupling nuts and comparable in strength to Grade 9 bolts.
For technical drawings and 3-D models, click on a part number.
Each | |||||
---|---|---|---|---|---|
Thread Size | Lg. | Wd. | 1-9 | 10-Up | |
Steel—ASTM Grade 2H | |||||
1/4"-20 | 7/8" | 1/2" | 000000000 | 000000 | 000000 |
3/8"-16 | 1 3/4" | 11/16" | 000000000 | 00000 | 00000 |
1/2"-13 | 1 3/4" | 7/8" | 000000000 | 00000 | 00000 |
5/8"-11 | 2 1/8" | 1 1/16" | 000000000 | 00000 | 00000 |
3/4"-10 | 2 1/4" | 1 1/4" | 000000000 | 00000 | 00000 |
7/8"-9 | 2 1/2" | 1 1/2" | 000000000 | 00000 | 00000 |
1"-8 | 2 3/4" | 1 5/8" | 000000000 | 00000 | 00000 |
1 1/4"-7 | 3" | 2" | 000000000 | 00000 | 00000 |
1 1/2"-6 | 3 1/2" | 2 3/8" | 000000000 | 00000 | 00000 |