Metallics TP507SBC Screws 8 x 1-1/2 Btn Hx Pin TR SMS 18 (100 pcs)

The Metallics TP507SBC is a #8 x 1-1/2 inch sheet metal screw with a button head and a pin-in-hex (hex pin) tamper-resistant drive. You need a matching pin-hex security bit to drive or remove them, which is the point of the design: standard hex keys and drivers won't turn them.

Each pack of the TP507SBC tamper-resistant screws holds 100 pieces. That's a single box quantity, so if you're securing a run of covers, plates, or enclosures across a building, count your fastener points and order packs accordingly.

The TP507SBC is an 18-series stainless sheet metal screw, which is the 18-8 austenitic stainless family commonly used for corrosion resistance in damp and outdoor fastening. That makes it suitable for exterior covers and enclosures where a plain steel screw would rust and seize.

Sheet metal screw threading runs the full length with a sharp, coarse thread, so the TP507SBC bites into sheet metal, and it will also hold in wood framing and plastic. It is not a self-drilling screw, so in metal you need to pilot the hole first. At 1-1/2 inches of length it's sized for fastening through a cover or bracket into a substrate behind it, not for thin-to-thin sheet joints where the point would protrude.

Pin-in-hex screws keep casual hands out. The pin in the center of the recess blocks a normal hex key, so only a crew carrying the matching security bit can open the cover. Electricians and facility maintenance use them on panel covers, device plates, light fixture housings, and anything in a public corridor, school, or transit space where a standard screw invites tampering. If nobody on your crew stocks pin-hex bits, a standard drive screw is the simpler choice.

The pack is 100 screws only. The pin-in-hex driver bit sized to the recess is a separate purchase, so order one with the screws if your techs don't already carry pin-hex bits in their kits.

Button head means a low, rounded head that sits on top of the surface rather than countersinking into it. There's no flat-head taper, so you don't need a countersunk hole, but the head will stand slightly proud of the cover. If you need a flush face, specify a flat-head tamper screw instead.