Screw 5/16-18 x 1/2 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 JSS51612 – Frequently Asked Questions
1) Will a 5/16-18 x 1/2 inch set screw work as a replacement in a mechanical lug or split bolt connector?
It will, provided the existing screw measures 5/16-18 and the hole depth accepts a 1/2 inch length. The JSS51612 matches that thread and length with a cup point, which is the usual configuration for conductor clamping screws. Back out the old screw and measure the thread before ordering; a 5/16-24 fine thread hole will not take it.
2) How many screws come in a jar of Metallics JSS51612?
100 screws per jar. Metallics packages the JSS51612 in a jar rather than a box, so it's a shop-bin quantity for electricians keeping 5/16-18 set screws on hand for lug and connector work.
3) Do I need an Allen key for the JSS51612 set screw, or does it take a screwdriver?
It's a socket (SKT) set screw, so it drives with a hex key in the internal socket, not a screwdriver. There is no external head to grip, which is why these sit flush or below the surface once tightened.
4) What does the cup point on the JSS51612 do, and when should I use a flat point instead?
The cup point is a hollowed, serrated-edge tip that bites into the mating part and resists backing out, which is why it's the standard choice for clamping conductors in lugs, set screw connectors, and collars. It leaves a mark in the material, so where you need to clamp a finished shaft or reposition the part later, a flat-point set screw is the better pick. For permanent, high-holding clamping on steel or copper, the cup point is what you want.
How fast can I get the Metallics JSS51612 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
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 JSS51612 come with a warranty?
Absolutely. The Metallics JSS51612 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 JSS51612?
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