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Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
- Product Subgroup:
- Screws
Metallics TP135SBC – Frequently Asked Questions
1) What thread size and length is the Metallics TP135SBC screw?
The TP135SBC is a 3/8-16 x 3/4 inch machine screw. That is a 3/8 inch diameter body with 16 threads per inch (standard 3/8 UNC coarse), so it mates with a tapped 3/8-16 hole or a 3/8-16 nut, with 3/4 inch of length under the head to work with.
2) What driver do I need for a button head hex pin tamper-resistant screw?
Hex pin (also called pin-in-hex or pin-in-socket) heads need a hex key or bit with a hole bored down the center so it can clear the pin standing in the middle of the socket. A plain Allen key will not seat. For a 3/8-16 screw like the TP135SBC, order the matching pin-in-hex driver bit at the same time, since a standard hex set will not turn it.
3) Why use a tamper-resistant screw instead of a standard hex socket screw?
The pin in the center of the socket means nobody opens the assembly with an off-the-shelf hex key, which is the point on anything in a public corridor, a tenant space, a lobby fixture, or an exterior enclosure. The TP135SBC is a 3/8-16 x 3/4 machine screw in that pin-in-hex configuration, so it swaps in anywhere a 3/8-16 socket screw is already holding a cover or guard and you want it to stay put.
4) How many screws come in a box of Metallics TP135SBC?
They ship 100 pieces to the box. For a maintenance crew standardizing tamper-resistant fasteners across a building, that is one box plus one driver bit covering a lot of openings; for a single repair, expect the full 100-count.
5) Will a button head screw work where I need a flush surface?
No. A button head sits proud of the material with a low, rounded dome, so it needs clearance above the surface. If the detail calls for the fastener to sit flush or below flush, you need a flat (countersunk) head in a countersunk hole instead, not the TP135SBC.
6) Is the TP135SBC a machine screw or a self-tapping sheet metal screw?
It is a machine screw, so the threads run the full uniform 3/8-16 pitch and it needs a pre-tapped hole or a nut. It will not cut its own thread in sheet metal. If you are fastening into unthreaded stock, drill and tap to 3/8-16 first or back it with a nut.
7) What is the Metallics part number to order for 3/8-16 x 3/4 pin-in-hex button head screws?
TP135SBC is the Metallics part number, and that is the number to put on the order or the PO so you get the 3/8-16 x 3/4 button head pin-in-hex tamper-resistant machine screw in the 100-piece box.
How fast can I get the Metallics TP135SBC 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 TP135SBC come with a warranty?
Absolutely. The Metallics TP135SBC 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 TP135SBC?
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