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Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
- Product Subgroup:
- Screws
Metallics JSS3878 – Frequently Asked Questions
1) What thread size and length is the Metallics JSS3878 socket set screw?
The JSS3878 is a 3/8-16 x 7/8 inch socket set screw with a cup point. The 3/8-16 designation means a 3/8 inch nominal diameter with 16 threads per inch, so it mates with any 3/8-16 tapped hole or standard coarse-thread collar.
2) How many screws come in a jar of Metallics JSS3878?
Each jar holds 100 screws. Metallics packages this one in a jar rather than a box, which is the format most electricians keep on the van or in a bin for repeat use.
3) What tool do I need to drive a cup point socket set screw like the JSS3878?
It takes a hex key (Allen wrench), not a screwdriver. The JSS3878 is a socket set screw, meaning the drive is an internal hex recess in the end of the screw, and it has no head, so it seats flush or below the surface of whatever it is threaded into.
4) What is a cup point set screw used for in electrical work?
A cup point bites into the mating surface, so it is the common choice for locking a collar, coupling, pulley, or conduit fitting onto a shaft or rod and keeping it from turning. The ring edge of the cup digs a small permanent mark, which is what gives the holding power. If you need to clamp something you plan to reposition often without marring it, a flat point is the better choice.
How fast can I get the Metallics JSS3878 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 JSS3878 come with a warranty?
Absolutely. The Metallics JSS3878 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 JSS3878?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Metallics JSS3878 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.