Metallics TP110SBC Screws 8-32 x 2 Btn Hx Pin TR MS 18-8 (100 pcs)

The TP110SBC is a pin-in-hex (hex pin) tamper-resistant button head screw, so a standard hex key will not seat. You need a pin-in-hex security bit or key with a hole bored down the center to clear the pin in the middle of the recess, in the size matching an 8-32 button head. Plan on having the security driver on the truck before you start the install.

They are 18-8 stainless steel, the common austenitic grade used for general corrosion resistance. That holds up in damp interiors, covered exterior enclosures, and wash-down areas far better than plain or zinc-plated steel. For direct salt spray or coastal exposure, 316 stainless is the step up.

A button head sits proud of the surface with a low domed profile and bears on the face of the material, so it does not need a countersunk hole. Use a flat head only where the hole is already countersunk and you need the head flush. The TP110SBC is the button head version, which makes it the right pick for flat, un-countersunk covers and plates.

No. This is a machine screw with a straight 8-32 thread, so it needs a pre-tapped hole, a threaded insert, or a mating nut. If you are driving into unthreaded sheet metal you want a self-tapping or thread-forming tamper-resistant screw instead.

Each box holds 100 pieces of the 8-32 x 2 inch button head pin-in-hex screw. That is a working quantity for securing a run of enclosure covers, device plates, or fixture housings on one job rather than a single replacement.