About Flat Head Screws
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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. | |
1 1/8"-7 | |||||||||||
Black-Oxide Alloy Steel | |||||||||||
| 3" | Fully Threaded | __ | Coarse | 1 11/16" | 1 1/8" | 7/8" | 170,000 | ASTM A574 | 1 | 000000000 | 000000 |
| 3 1/2" | Partially Threaded | 2 7/8" | Coarse | 1 11/16" | 1 1/8" | 7/8" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
| 4" | Partially Threaded | 2 7/8" | Coarse | 1 11/16" | 1 1/8" | 7/8" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
| 4 1/2" | Partially Threaded | 2 7/8" | Coarse | 1 11/16" | 1 1/8" | 7/8" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
| 5" | Partially Threaded | 2 7/8" | Coarse | 1 11/16" | 1 1/8" | 7/8" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
| 5 1/2" | Partially Threaded | 2 7/8" | Coarse | 1 11/16" | 1 1/8" | 7/8" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
| 6" | Partially Threaded | 2 7/8" | Coarse | 1 11/16" | 1 1/8" | 7/8" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
| 6 1/2" | Partially Threaded | 2 7/8" | Coarse | 1 11/16" | 1 1/8" | 7/8" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
| 7" | Partially Threaded | 2 7/8" | Coarse | 1 11/16" | 1 1/8" | 7/8" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
| 8" | Partially Threaded | 2 7/8" | Coarse | 1 11/16" | 1 1/8" | 7/8" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
| 9" | Partially Threaded | 2 7/8" | Coarse | 1 11/16" | 1 1/8" | 7/8" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
| 10" | Partially Threaded | 2 7/8" | Coarse | 1 11/16" | 1 1/8" | 7/8" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
Alloy Steel Hex Drive Flat Head Screws
Made from alloy steel, these screws are nearly twice as strong as stainless steel flat head screws. They're angled under the head to sit flush within countersunk holes. Length is measured from the top of the head.
Black-oxide alloy steel screws have mild corrosion resistance in dry environments.
For technical drawings and 3-D models, click on a part number.