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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 TP235SFC – Frequently Asked Questions
1) What driver bit do I need for the Metallics TP235SFC tamper-resistant screw?
The TP235SFC uses a pin-in-star (tamper-resistant Torx) drive, so a standard Torx bit will not seat. You need a security Torx bit with the center hole bored out to clear the pin in the recess. Stock a matching security bit set with the screws, or the crew will be stuck on site with a head they cannot turn.
2) Does the TP235SFC screw need a tapped hole, or will it cut its own threads?
It is a machine screw in 1/4-20, so it needs a mating thread: a tapped 1/4-20 hole, a 1/4-20 nut, or a threaded insert. It will not form threads in sheet metal or a plain drilled hole the way a self-tapper does. 1/4-20 is the coarse UNC pitch, 20 threads per inch.
3) Will the head of this 1/4-20 tamper screw sit flush?
Yes, if the hole is countersunk. The TP235SFC is a flat head, which is a countersunk head with a conical underside, so it finishes flush in an 82 degree countersink or in a punched countersunk hole in a cover plate. On a flat, un-countersunk surface the head will stand proud; use a pan or truss head fastener there instead.
4) How deep does a 3/8 inch long flat head screw actually engage?
The 3/8 inch is the overall length measured from the top of the head, because flat head screws are measured overall rather than under the head. So the usable thread below a countersunk plate is 3/8 inch minus the head depth. For thin enclosure covers, tapped bosses, and plate work that is normally fine; if you are clamping anything thicker than light sheet you will want a longer 1/4-20.
5) How many Metallics TP235SFC screws come in a box?
They are packed 100 pieces per box under part number TP235SFC, which is the quantity most electrical and MRO buyers keep on the shelf for panel covers, trough lids, and other openings that need to resist casual removal. Order the security bits separately.
6) Are pin-in-star screws worth using over regular Phillips on electrical covers?
They are, where the concern is casual tampering rather than a determined attack. A 1/4-20 flat head in pin-in-star cannot be backed out with a screwdriver from a truck box or a common Torx bit, so junction box covers, trough lids, and fixture housings in public or tenant areas stay shut. If the panel is opened daily by your own techs, a standard drive saves time; reserve the tamper-resistant heads for the openings you want left alone.
How fast can I get the Metallics TP235SFC 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 TP235SFC come with a warranty?
Absolutely. The Metallics TP235SFC 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 TP235SFC?
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 TP235SFC from ZenSupply?
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and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.