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Screw 3/8-16 x 1 SHCS 18-8 SS (Jar 50)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
- Product Subgroup:
- Screws
Metallics JSHC381SS – Frequently Asked Questions
1) What size and thread is the Metallics JSHC381SS socket head cap screw?
It is a 3/8-16 x 1 inch socket head cap screw. The 3/8-16 call-out means a 3/8 inch nominal diameter with 16 threads per inch, which is the UNC coarse pitch for that diameter, and the 1 inch is the shank length under the head. Mating nuts or tapped holes must be 3/8-16, not the 3/8-24 fine thread.
2) Are these 3/8-16 cap screws stainless, and will they hold up outdoors or in damp locations?
They are 18-8 stainless steel, the 300 series austenitic grade commonly specified for general corrosion resistance. That makes them suitable for damp and exterior locations where a plain or zinc-plated screw would rust, though 18-8 is not the choice for chloride-heavy marine exposure, where 316 stainless is used instead.
3) What driver do I need for the Metallics JSHC381SS screw?
A socket head cap screw takes a hex key (Allen wrench) in the recess of the head, not a screwdriver or a wrench on the outside. For a 3/8-16 inch-series SHCS that is a 5/16 inch hex key.
4) How many screws come in a jar of Metallics JSHC381SS?
Fifty screws per jar. Metallics packages this one in a jar rather than a box, which is the format MRO and electrical stockrooms use for bin stock on a shelf.
5) Is the JSHC381SS screw sold with nuts or washers?
No. The JSHC381SS is a jar of fifty 3/8-16 x 1 socket head cap screws only. If you are through-bolting rather than threading into a tapped hole, order 3/8-16 nuts and 3/8 flat or lock washers separately, and match them in 18-8 stainless so you are not mixing dissimilar metals.
6) Why use a socket head cap screw instead of a hex bolt for mounting electrical equipment?
A socket head cap screw drives from inside the head, so it works in a counterbored hole or a tight pocket where there is no room to swing a wrench, and the cylindrical head sits flush against the surface. A hex head bolt needs clearance around the head for a socket or wrench. On an enclosure, strut bracket, or machine frame where the fastener is recessed or crowded by other components, the 3/8-16 x 1 SHCS is the one that fits the access you actually have.
7) Will the JSHC381SS stainless screw match the 3/8-16 hardware already on my equipment?
If what is in the hole now is a 3/8-16 thread, the JSHC381SS threads straight in. Two things to check before swapping: the existing screw's length, since this one is 1 inch under the head, and the head style, because a socket head needs a hex key and will not accept a wrench or screwdriver. Head diameter also differs from a hex head, so a tight counterbore sized for something else may not take it.
How fast can I get the Metallics JSHC381SS delivered?
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Can I return it if it doesn’t work for me?
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reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Metallics JSHC381SS come with a warranty?
Absolutely. The Metallics JSHC381SS is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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