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About Socket Head Screws
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Mil. Spec. Alloy Steel Socket Head Screws
Partially Threaded
Choose these screws for their adherence to strict military standards for material and construction. With a tensile strength of 160,000 psi, these alloy steel screws are stronger than Grade 8 steel screws. They're cadmium plated to resist corrosion in wet environments. Length is measured from under the head.
Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing  | Dia. | Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Each | |
Cadmium-Plated Alloy Steel | ||||||||||
1/4"-20 | ||||||||||
| 1 3/4" | Partially Threaded | 1 1/4" | Coarse | 3/8" | 1/4" | 3/16" | 160,000 | MS16997-65, NAS1352-4-28P | 000000000 | 00000 |