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About Nuts, Materials, and Finishes
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Metric Low-Strength Steel Square Nuts
Large flat sides make these metric nuts easy to grip with a wrench and keep them from rotating in channels and square holes. About half the strength of medium-strength steel square nuts, use them in light duty fastening applications, such as securing access panels.
Steel square nuts are best for dry environments, since moisture will cause them to rust.
Zinc-plated steel square nuts resist corrosion in wet environments.
Black zinc-plated steel square nuts resist corrosion in wet environments and have a black finish that blends in with dark surfaces.
For technical drawings and 3-D models, click on a part number.
Thread | |||||||
|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Specifications Met | Pkg. Qty. | Pkg. | |
Steel—Class 5 | |||||||
| M4 | 0.7 | 7 | 3 | DIN 557 | 50 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 4 | DIN 557 | 50 | 000000000 | 0000 |
| M6 | 1 | 10 | 5 | DIN 557 | 25 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 6.5 | DIN 557 | 25 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 8 | DIN 557 | 10 | 000000000 | 0000 |
| M12 | 1.75 | 19 | 10 | DIN 557 | 5 | 000000000 | 0000 |
| M16 | 2 | 24 | 13 | DIN 557 | 1 | 000000000 | 0000 |
Zinc-Plated Steel—Class 5 | |||||||
| M4 | 0.7 | 7 | 3.2 | DIN 557 | 100 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 4 | DIN 557 | 100 | 000000000 | 0000 |
| M6 | 1 | 10 | 5 | DIN 557 | 100 | 000000000 | 00000 |
| M8 | 1.25 | 13 | 6.5 | DIN 557 | 25 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 8 | DIN 557 | 25 | 000000000 | 0000 |
| M12 | 1.75 | 19 | 10 | DIN 557 | 10 | 000000000 | 0000 |
| M16 | 2 | 24 | 13 | DIN 557 | 5 | 000000000 | 0000 |
| M20 | 2.5 | 30 | 16 | DIN 557 | 5 | 000000000 | 00000 |
Black Zinc-Plated Steel—Class 5 | |||||||
| M4 | 0.7 | 7 | 3 | DIN 557 | 25 | 000000000 | 0000 |
| M5 | 0.8 | 8 | 4 | DIN 557 | 25 | 000000000 | 0000 |
| M6 | 1 | 10 | 5 | DIN 557 | 25 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 6.5 | DIN 557 | 10 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 8 | DIN 557 | 10 | 000000000 | 0000 |
| M12 | 1.75 | 19 | 10 | DIN 557 | 5 | 000000000 | 0000 |
| M16 | 2 | 24 | 13 | DIN 557 | 1 | 000000000 | 0000 |
Low-Strength Steel Square Nuts
Large flat sides make these nuts easy to grip with a wrench and keep them from rotating in channels and square holes. About half the strength of medium-strength steel square nuts, use them in light duty fastening applications, such as securing access panels.
Hot-dipped galvanized steel square nuts have a thick coating for better corrosion resistance than zinc-plated steel nuts. They must be used with other hot-dipped galvanized fasteners.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Pkg. Qty. | Pkg. | |
Hot-Dipped Galvanized Steel | |||||
|---|---|---|---|---|---|
| 5/16"-18 | 9/16" | 17/64" | 100 | 000000000 | 000000 |
| 3/8"-16 | 5/8" | 21/64" | 100 | 000000000 | 00000 |
| 1/2"-13 | 13/16" | 7/16" | 50 | 000000000 | 00000 |
| 5/8"-11 | 1" | 35/64" | 25 | 000000000 | 00000 |
| 3/4"-10 | 1 1/8" | 21/32" | 10 | 000000000 | 0000 |
| 7/8"-9 | 1 5/16" | 49/64" | 5 | 000000000 | 0000 |
| 1"-8 | 1 1/2" | 7/8" | 5 | 000000000 | 00000 |
Steel | |||||
| 1/4"-20 | 7/16" | 7/32" | 100 | 000000000 | 0000 |
| 5/16"-18 | 9/16" | 17/64" | 100 | 000000000 | 00000 |
| 3/8"-16 | 5/8" | 21/64" | 100 | 000000000 | 00000 |
| 7/16"-14 | 3/4" | 3/8" | 25 | 000000000 | 00000 |
| 1/2"-13 | 13/16" | 7/16" | 50 | 000000000 | 00000 |
| 5/8"-11 | 1" | 35/64" | 25 | 000000000 | 00000 |
| 3/4"-10 | 1 1/8" | 21/32" | 10 | 000000000 | 0000 |
| 7/8"-9 | 1 5/16" | 49/64" | 5 | 000000000 | 00000 |
| 1"-8 | 1 1/2" | 7/8" | 5 | 000000000 | 00000 |
| 1 1/8"-7 | 1 11/16" | 1" | 1 | 000000000 | 0000 |
| 1 1/4"-7 | 1 7/8" | 1 3/32" | 1 | 000000000 | 0000 |
| 1 1/2"-6 | 2 1/4" | 1 5/16" | 1 | 000000000 | 0000 |
Medium-Strength Steel Square Nuts
Large flat sides make these nuts easy to grip with a wrench and keep them from rotating in channels and square holes. Made from Grade 5 steel, they're suitable for fastening most machinery and equipment.
Zinc-plated nuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Pkg. Qty. | Pkg. | |
Steel—Grade 5 | |||||
|---|---|---|---|---|---|
| 1/4"-20 | 7/16" | 7/32" | 100 | 000000000 | 00000 |
| 5/16"-18 | 9/16" | 17/64" | 50 | 000000000 | 0000 |
| 3/8"-16 | 5/8" | 21/64" | 25 | 000000000 | 0000 |
| 7/16"-14 | 3/4" | 3/8" | 10 | 000000000 | 0000 |
| 1/2"-13 | 13/16" | 7/16" | 10 | 000000000 | 0000 |
| 5/8"-11 | 1" | 35/64" | 5 | 000000000 | 0000 |
| 3/4"-10 | 1 1/8" | 21/32" | 5 | 000000000 | 0000 |
| 7/8"-9 | 1 5/16" | 49/64" | 1 | 000000000 | 0000 |
| 1"-8 | 1 1/2" | 7/8" | 1 | 000000000 | 0000 |
| 1 1/4"-7 | 1 7/8" | 1 3/32" | 1 | 000000000 | 0000 |
Zinc-Plated Steel—Grade 5 | |||||
| 1/4"-20 | 7/16" | 7/32" | 100 | 000000000 | 0000 |
| 5/16"-18 | 9/16" | 17/64" | 100 | 000000000 | 00000 |
| 3/8"-16 | 5/8" | 21/64" | 50 | 000000000 | 00000 |
| 7/16"-14 | 3/4" | 3/8" | 25 | 000000000 | 00000 |
| 1/2"-13 | 13/16" | 7/16" | 25 | 000000000 | 00000 |
| 5/8"-11 | 1" | 35/64" | 10 | 000000000 | 0000 |
| 3/4"-10 | 1 1/8" | 21/32" | 10 | 000000000 | 00000 |
| 7/8"-9 | 1 5/16" | 49/64" | 5 | 000000000 | 00000 |
| 1"-8 | 1 1/2" | 7/8" | 1 | 000000000 | 0000 |
| 1 1/8"-7 | 1 11/16" | 1" | 1 | 000000000 | 0000 |
| 1 1/4"-7 | 1 7/8" | 1 3/32" | 1 | 000000000 | 0000 |
| 1 1/2"-6 | 2 1/4" | 1 5/16" | 1 | 000000000 | 00000 |
18-8 Stainless Steel Square Nuts
These square nuts have good chemical resistance and may be mildly magnetic. Large flat sides make them easy to grip with a wrench and keep them from rotating in channels and square holes.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||
|---|---|---|---|---|---|
| 4-40 | 1/4" | 3/32" | 100 | 000000000 | 000000 |
| 6-32 | 5/16" | 7/64" | 100 | 000000000 | 00000 |
| 8-32 | 11/32" | 1/8" | 100 | 000000000 | 00000 |
| 10-24 | 3/8" | 1/8" | 100 | 000000000 | 00000 |
| 10-32 | 3/8" | 1/8" | 100 | 000000000 | 00000 |
| 1/4"-20 | 7/16" | 3/16" | 50 | 000000000 | 00000 |
| 1/4"-28 | 7/16" | 3/16" | 25 | 000000000 | 0000 |
| 5/16"-18 | 9/16" | 7/32" | 25 | 000000000 | 0000 |
| 5/16"-24 | 9/16" | 7/32" | 10 | 000000000 | 0000 |
| 3/8"-16 | 5/8" | 1/4" | 25 | 000000000 | 00000 |
| 3/8"-24 | 5/8" | 1/4" | 10 | 000000000 | 0000 |
| 7/16"-14 | 3/4" | 3/8" | 5 | 000000000 | 0000 |
| 7/16"-20 | 3/4" | 3/8" | 5 | 000000000 | 00000 |
| 1/2"-13 | 13/16" | 7/16" | 5 | 000000000 | 0000 |
| 5/8"-11 | 1" | 35/64" | 1 | 000000000 | 0000 |
| 3/4"-10 | 1 1/8" | 21/32" | 1 | 000000000 | 0000 |
| 1"-8 | 1 1/2" | 7/8" | 1 | 000000000 | 00000 |
Metric 18-8 Stainless Steel Square Nuts
Made from 18-8 stainless steel, these square nuts have good chemical resistance and may be mildly magnetic. Large flat sides make them easy to grip with a wrench and keep them from rotating in channels and square holes.
For technical drawings and 3-D models, click on a part number.
Super-Corrosion-Resistant 316 Stainless Steel Square Nuts
These square nuts have excellent resistance to chemicals and salt water. Large flat sides make them easy to grip with a wrench and keep them from rotating in channels and square holes.
For technical drawings and 3-D models, click on a part number.
Brass Square Nuts
These square nuts are corrosion resistant in wet environments, electrically conductive, and nonmagnetic. Large flat sides make them easy to grip with a wrench and keep them from rotating in channels and square holes.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Pkg. Qty. | Pkg. | |
Brass | |||||
|---|---|---|---|---|---|
| 4-40 | 1/4" | 3/32" | 100 | 000000000 | 00000 |
| 6-32 | 5/16" | 7/64" | 100 | 000000000 | 00000 |
| 8-32 | 11/32" | 1/8" | 50 | 000000000 | 0000 |
| 10-24 | 3/8" | 1/8" | 50 | 000000000 | 0000 |
| 10-32 | 3/8" | 1/8" | 50 | 000000000 | 0000 |
| 1/4"-20 | 7/16" | 3/16" | 25 | 000000000 | 00000 |
| 5/16"-18 | 9/16" | 7/32" | 10 | 000000000 | 0000 |
| 3/8"-16 | 5/8" | 1/4" | 10 | 000000000 | 00000 |
| 1/2"-13 | 13/16" | 7/16" | 5 | 000000000 | 00000 |
Plastic Square Nuts
These fiberglass square nuts are chemical resistant, nonconductive, and lightweight. Large flat sides make them easy to grip with a wrench and keep them from rotating in channels and square holes.
For technical drawings and 3-D models, click on a part number.