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About Flat Head Screws
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Mil. Spec. Stainless Steel Hex Drive Flat Head Screws
Choose these screws for their adherence to strict military standards for material and construction. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. All are passivated for added protection against oxidation and corrosion. Screws are angled under the head to sit flush within countersunk holes. Length is measured from the top of the head.
| Lg. | Threading | Min. Thread Lg. | Head Dia. | Head Ht. | Drive Size | Tensile Strength, psi  | Specifications Met | Each | |
18-8 Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
5/16"-18 | |||||||||
| 1 1/2" | Partially Threaded | 1 1/4" | 0.656" | 0.198" | 3/16" | 70,000 | Fed. Spec. QQ-P-35, MS24671-43 | 000000000 | 000000 |