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Screw 5/16-18 x 3/8 SKT S-Scr Cup St (Jar 100)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
- Product Subgroup:
- Screws
Metallics JSS51638 – Frequently Asked Questions
1) Is the JSS51638 a cup point set screw, and what does that mean for holding a shaft or lug?
Cup point, yes. The hollowed, sharp-edged cup bites into the mating surface and gives high holding power on shafts, collars, pulleys, and grounding or terminal lugs. It does mar the part it clamps, so if you need a reusable, non-marring hold use a flat point instead; for permanent or semi-permanent clamping the cup point is the usual pick.
2) What tool drives the Metallics JSS51638 set screw?
It is a socket (internal hex) set screw, so it drives with a hex key, not a screwdriver. A 5/16-18 socket set screw takes a 5/32 inch hex key. Because there is no head, the screw seats flush or below the surface of the collar or lug it is threaded into.
3) Is the JSS51638 set screw steel or stainless?
Steel. The JSS51638 is a plain steel socket set screw, so keep it to dry indoor use. For wet, outdoor, or corrosive locations choose a stainless set screw in the same 5/16-18 x 3/8 size instead.
4) Can I use these set screws on electrical lugs and ground clamps?
That is what Metallics stocks them for. The JSS51638 is part of their electrical fastener line, and a 5/16-18 cup point socket set screw is the common replacement for the clamping screw in mechanical lugs, split bolts, ground clamps, and busbar connectors. Match the thread of the existing hole, 5/16-18, and the 3/8 inch length before swapping.
5) How many Metallics JSS51638 screws come in a jar?
Each jar holds 100 pieces. Metallics ships this size as a jar pack, which is the typical shop or service-van quantity for set screws you go through a few at a time rather than a bulk box.
6) What is the exact part number to order this Metallics set screw?
Order Metallics JSS51638. That single part number covers the 5/16-18 x 3/8 inch steel socket set screw with a cup point, packed 100 to a jar. Adjacent Metallics numbers in the same series change the length or the diameter, so confirm both figures against your tapped hole.
How fast can I get the Metallics JSS51638 delivered?
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Metallics JSS51638 come with a warranty?
Absolutely. The Metallics JSS51638 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Metallics JSS51638?
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