You may also like
Screws 5/16-18 x 2 FH Hx Pin TR MS 18 (100 pcs)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
- Product Subgroup:
- Screws
Metallics TP138SFC – Frequently Asked Questions
1) What thread size and length is the Metallics TP138SFC machine screw?
The TP138SFC is a 5/16-18 x 2 inch machine screw. The 5/16-18 designation means a 5/16 inch nominal diameter with 18 threads per inch, which is the standard UNC coarse pitch for that diameter, so it mates with 5/16-18 tapped holes and standard 5/16-18 nuts. Overall length is 2 inches under the head, measured as a flat head screw is (total length, since the head sits flush).
2) Do I need a special bit to drive the Metallics TP138SFC screw?
Yes. It's a hex pin drive tamper resistant screw, meaning the recess is a hex socket with a solid pin in the center. A standard hex key or hex bit will not seat on it. You need a pin-in-hex (hex pin) driver of the matching size, which has a hollow center to clear the pin. That's the point of the fastener: once it's installed, nobody without the right bit backs it out.
3) How many screws come in a pack of Metallics TP138SFC?
They ship 100 pieces per pack. That's a working quantity for securing a run of covers, enclosures, panels, or guards where every fastener has to be tamper resistant, rather than a single-piece replacement.
4) Will the TP138SFC tamper resistant screw sit flush with the surface?
It's a flat head screw, so it seats flush in a countersunk hole. The hole has to be countersunk (or the part has to come with a countersunk clearance hole) for the head to pull down level. If you're fastening into a plain drilled hole with no countersink, a flat head will stand proud and won't clamp properly, and you'd want a pan or button head instead.
5) Is a machine screw like the TP138SFC the right fastener for sheet metal or wood?
No. A machine screw has a uniform straight thread and no self-tapping point, so it needs a pre-tapped hole or a nut behind it. For 5/16-18 that means a tapped 5/16-18 hole in metal, a 5/16-18 nut, or a threaded insert. If you're going into unthreaded sheet metal, use a self-drilling or sheet metal screw; for wood, a wood screw or lag. The TP138SFC is for assemblies that are already threaded and need the security head.
6) What part number do I order for Metallics 5/16-18 x 2 hex pin tamper resistant screws?
Order Metallics MPN TP138SFC. That single part number covers the 5/16-18 x 2 inch flat head, hex pin tamper resistant machine screw supplied 100 per pack. There's no size or finish choice to specify on it.
How fast can I get the Metallics TP138SFC 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 TP138SFC come with a warranty?
Absolutely. The Metallics TP138SFC 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 TP138SFC?
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 TP138SFC 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.