About Nuts, Materials, and Finishes
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About Socket Head Screws
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Alloy Steel Socket Head Screws
With a tensile strength of 170,000 psi, these alloy steel screws are stronger than Grade 8 steel screws. Length is measured from under the head.
Black-oxide steel screws are mildly corrosion resistant in dry environments.
Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch.
Screws that meet ASTM A574, ASTM A574M, and ISO 898-1 comply with specifications and testing requirements for material quality.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
2 1/4"-4 1/2 | |||||||||||
Black-Oxide Alloy Steel | |||||||||||
4" | Fully Threaded | __ | Coarse | 3 3/8" | 2 1/4" | 1 3/4" | 170,000 | ASTM A574 | 1 | 000000000 | 0000000 |
6" | Partially Threaded | 5 5/8" | Coarse | 3 3/8" | 2 1/4" | 1 3/4" | 170,000 | ASTM A574 | 1 | 000000000 | 000000 |
8" | Partially Threaded | 5 5/8" | Coarse | 3 3/8" | 2 1/4" | 1 3/4" | 170,000 | ASTM A574 | 1 | 000000000 | 000000 |
10" | Partially Threaded | 5 5/8" | Coarse | 3 3/8" | 2 1/4" | 1 3/4" | 170,000 | ASTM A574 | 1 | 000000000 | 000000 |
Low-Strength Steel Hex Nuts
About half the strength of medium-strength steel nuts, these nuts are for light duty fastening applications, such as securing access panels.
For technical drawings and 3-D models, click on a part number.
Thread Size | Wd. | Ht. | Specifications Met | Pkg. Qty. | Pkg. | |
Steel—Grade 2 | ||||||
---|---|---|---|---|---|---|
2 1/4"-4 1/2 | 3 3/8" | 1 15/16" | ASME B18.2.2 | 1 | 000000000 | 000000 |
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.
For technical drawings and 3-D models, click on a part number.
Thread Size | Wd. | Ht. | Specifications Met | Pkg. Qty. | Pkg. | |
Steel—ASTM Grade 2H | ||||||
---|---|---|---|---|---|---|
2 1/4"-4 1/2 | 3 1/2" | 2 13/64" | ASME B18.2.2, ASTM A194 | 1 | 000000000 | 000000 |
Medium-Strength Steel Heavy Hex Nuts—Grade 5
About 10% wider and taller than standard hex nuts, these heavy nuts distribute the load over a large area. Medium-strength steel nuts are suitable for fastening most machinery and equipment.
For technical drawings and 3-D models, click on a part number.
Thread Size | Wd. | Ht. | Pkg. Qty. | Pkg. | |
Steel—Grade 5 | |||||
---|---|---|---|---|---|
2 1/4"-4 1/2 | 3 1/2" | 2 13/64" | 1 | 000000000 | 000000 |
Steel Extra-Long Coupling Nuts
Also known as sleeve nuts, these are at least twice the length of standard coupling nuts to provide more room to connect and extend long lengths of threaded rods.
For technical drawings and 3-D models, click on a part number.
Each | ||||||
---|---|---|---|---|---|---|
Thread Size | Lg. | Wd. | Threading | 1-9 | 10-Up | |
Steel | ||||||
2 1/4"-4 1/2 | 9 1/2" | 3 1/2" | Partially Threaded | 000000000 | 0000000 | 0000000 |