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About Hex Head Screws and Bolts
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Mil. Spec. 18-8 Stainless Steel Hex Head Screws
Partially Threaded
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. Dimensions meet Fed. Spec. FF-S-85 specifications. Length is measured from under the head.
Match the thread spacing of mating components. Fine threads are closely spaced to prevent loosening from vibration.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing  | Wd. | Ht. | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
1/4"-28 | ||||||||||
| 2 1/4" | Partially Threaded | 3/4" | Fine | 7/16" | 5/32" | 70,000 | Fed. Spec. FF-S-85, MS35308-315 | 5 | 000000000 | 000000 |