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About Flat Head Screws
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Mil. Spec. Alloy Steel Hex Drive Flat Head Screws
Choose these screws for their adherence to strict military standards for material and construction. They're cadmium plated to resist corrosion in wet environments. Screws are angled under the head to sit flush within countersunk holes. Length is measured from the top of the head.
For technical drawings and 3-D models, click on a part number.
| Lg. | Threading | Head Dia. | Head Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Each | |
Cadmium-Plated Alloy Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
4-40 | ||||||||
| 1/4" | Fully Threaded | 0.255" | 0.083" | 1/16" | 140,000 | ASTM F835, MS24667-1 | 000000000 | 00000 |
| 3/8" | Fully Threaded | 0.255" | 0.083" | 1/16" | 140,000 | ASTM F835, MS24667-2 | 000000000 | 0000 |
| 3/4" | Fully Threaded | 0.255" | 0.083" | 1/16" | 140,000 | ASTM F835, MS24667-5 | 000000000 | 0000 |
6-32 | ||||||||
| 3/8" | Fully Threaded | 0.307" | 0.097" | 5/64" | 140,000 | ASTM F835, MS24667-8 | 000000000 | 0000 |
| 1/2" | Fully Threaded | 0.307" | 0.097" | 5/64" | 140,000 | ASTM F835, MS24667-9 | 000000000 | 0000 |
| 5/8" | Fully Threaded | 0.307" | 0.097" | 5/64" | 140,000 | ASTM F835, MS24667-10 | 000000000 | 0000 |
| 3/4" | Fully Threaded | 0.307" | 0.097" | 5/64" | 140,000 | ASTM F835, MS24667-11 | 000000000 | 0000 |
8-32 | ||||||||
| 3/8" | Fully Threaded | 0.359" | 0.112" | 3/32" | 140,000 | ASTM F835, MS24667-13 | 000000000 | 0000 |
| 1/2" | Fully Threaded | 0.359" | 0.112" | 3/32" | 140,000 | ASTM F835, MS24667-14 | 000000000 | 0000 |
| 5/8" | Fully Threaded | 0.359" | 0.112" | 3/32" | 140,000 | ASTM F835, MS24667-15 | 000000000 | 0000 |
1/4"-20 | ||||||||
| 5/8" | Fully Threaded | 0.531" | 0.161" | 5/32" | 140,000 | ASTM F835, MS24667-29 | 000000000 | 0000 |
| 3/4" | Fully Threaded | 0.531" | 0.161" | 5/32" | 140,000 | ASTM F835, MS24667-30 | 000000000 | 0000 |
| 1" | Fully Threaded | 0.531" | 0.161" | 5/32" | 140,000 | ASTM F835, MS24667-31 | 000000000 | 0000 |
5/16"-18 | ||||||||
| 1" | Fully Threaded | 0.656" | 0.198" | 3/16" | 140,000 | ASTM F835, MS24667-41 | 000000000 | 00000 |
3/8"-16 | ||||||||
| 1" | Fully Threaded | 0.781" | 0.234" | 7/32" | 140,000 | ASTM F835, MS24667-52 | 000000000 | 00000 |