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About Hex Head Screws and Bolts
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Mil. Spec. 18-8 Stainless Steel Hex Head Screws

Fully 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 | Thread Spacing | Wd. | Ht. | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
3/8"-24 | |||||||||
5/8" | Fully Threaded | Fine | 9/16" | 15/64" | 70,000 | Fed. Spec. FF-S-85, MS35308-357 | 5 | 000000000 | 00000 |