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Screws 1/4-20 x 1/2 FH Span TR MS USA (100 pcs)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
- Product Subgroup:
- Screws
Metallics TP318SFC – Frequently Asked Questions
1) Do I need a special driver for the Metallics TP318SFC tamper-resistant screw?
Yes. The TP318SFC uses a spanner (snake eye) tamper-resistant head, which has two round holes in the face instead of a slot or cross recess. A standard flat, Phillips or hex driver will not turn it. You need a spanner bit sized for 1/4-20 head hardware, and you should have one on hand before the screws go in, because the whole point of the head is that common drivers skip out of it.
2) Can I use the TP318SFC to replace a Phillips 1/4-20 x 1/2 flat head screw to stop tampering?
Yes, as long as the existing hole is a 1/4-20 tapped hole or takes a 1/4-20 nut and the seat is countersunk. The TP318SFC matches that thread, length and flat head profile, so it drops into the same prep; only the drive changes, from a common recess to a spanner head that standard bits will not grip. Any hardware you still need routine access to should keep a conventional screw.
3) Will the TP318SFC sit flush in a countersunk hole?
It will, if the hole is countersunk. The TP318SFC is a flat head screw, so the tapered underside of the head pulls down into an 82 degree countersink and finishes level with the surface. On a plain drilled hole with no chamfer the head will stand proud and may not seat squarely, which matters on cover plates and enclosure doors where a raised head catches.
4) Are these tamper-resistant screws plain steel or stainless?
The TP318SFC is a mild steel (MS) screw of US manufacture. Mild steel is the right call for dry interior work such as electrical covers, panel fronts and indoor fixtures. For exterior, washdown or coastal locations, specify a stainless tamper-resistant screw in the same 1/4-20 x 1/2 flat head spanner configuration instead, since bare mild steel will corrode in those conditions.
5) How many screws come in a box of Metallics TP318SFC?
100 pieces per box. That quantity suits a building-wide job, standardizing security screws across a run of panels, fixtures or cover plates so every opening takes the same spanner bit, rather than a one-off repair.
6) What part number do I order for Metallics 1/4-20 x 1/2 spanner security screws?
Order Metallics TP318SFC. That part number covers the 1/4-20 x 1/2 inch flat head spanner tamper-resistant mild steel screw in the 100 piece box, and it is the only configuration the part number carries, so there is no size or finish option to specify alongside it.
How fast can I get the Metallics TP318SFC 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 TP318SFC come with a warranty?
Absolutely. The Metallics TP318SFC 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 TP318SFC?
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 TP318SFC 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.