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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 TP139SFC – Frequently Asked Questions
1) Do I need a special driver for a hex pin tamper-resistant screw?
Yes. The hex pin head on the TP139SFC has a solid post in the center of the hex recess, so a standard hex key or Allen bit will not seat. You need a pin-in-hex (hex pin) bit sized to the recess. Order the driver bits along with the screws if your crew doesn't already carry them.
2) Will a flat head tamper screw sit flush in my panel or enclosure?
A flat head screw seats flush only in a countersunk hole. The TP139SFC's flat head is made for a chamfered or countersunk clearance hole; drop it into a plain drilled hole and the head will stand proud. For a flat, uncountersunk surface, use a pan or button head tamper screw instead.
3) Can I use these screws to fasten into drywall, wood, or unthreaded sheet metal?
No. The TP139SFC is a machine screw with a 3/8-16 thread, which needs a mating tapped hole, nut, or threaded insert. For wood, drywall, or thin unthreaded sheet it is the wrong fastener, use a self-tapping or sheet metal tamper screw.
4) How much material thickness can a 1/2 inch long machine screw hold?
On a flat head screw the 1/2 inch is measured to the top of the head, so the whole 1/2 inch is the usable grip. Subtract the thickness of the part you're clamping to find your thread engagement, for a 3/8-16 thread you want roughly the thread diameter engaged in the tapped material. Thicker assemblies need a longer screw.
5) Why would an electrical contractor specify a tamper-resistant screw instead of a standard one?
Tamper-resistant screws like the TP139SFC are specified where the public can reach the hardware, panel covers, device plates, fixture housings, and enclosures in schools, transit areas, correctional facilities, and multi-family common spaces. The hex pin drive means no one opens it with a pocket multi-tool or standard Allen key.
6) How are the Metallics TP139SFC screws packaged for a job order?
They come 100 pieces per box under part number TP139SFC. That quantity suits a full panel or plate changeout, order multiples if you're standardizing a building on tamper-resistant fasteners so every opening takes the same bit.
How fast can I get the Metallics TP139SFC 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 TP139SFC come with a warranty?
Absolutely. The Metallics TP139SFC 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 TP139SFC?
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 TP139SFC 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.