Metallics TP617SFC Screws 14 x 1-1/4 FH Star Pin TR SMS 18-8 (100 pcs)

The TP617SFC is a star (Torx) pin-in-head screw, so a standard Torx bit will not seat. You need a pin-in-Torx (Torx-Pin) security bit, which is hollowed in the center to clear the pin in the recess. That pin is the whole point of the fastener: it blocks a common Torx driver and keeps tenants, students, or passers-by out of the covers and plates it secures.

That is what it is made for. The TP617SFC is a #14 x 1-1/4 inch sheet metal screw, so it has a fully threaded body with a coarse, sharp thread that cuts and holds in thin-gauge steel, aluminum, and similar sheet material. Sheet metal screws are not self-drilling, so you pilot the hole first, or use an existing punched hole. The 1-1/4 inch length is measured to the top of the flat head.

These are 18-8 stainless steel, the austenitic 300 series grade commonly used for general corrosion resistance. That suits damp and exterior-exposed locations such as outdoor device covers, fence-mounted enclosures, and washdown areas, and it avoids the rust bleed you get from plated carbon steel. For salt-spray coastal exposure, a 316 stainless fastener is the step up.

Flat head means a tapered 82 degree underside that pulls down flush with the surface, so the hole needs to be countersunk or the material needs a factory-dimpled hole. In thin sheet steel a dimpled or countersunk punch gives you a true flush face. If the plate or cover you are fastening has a flat, uncountersunk hole, a pan or hex washer head screw is the better choice because a flat head will just stand proud and rock.

Order it as Metallics TP617SFC. That part number covers the #14 x 1-1/4 inch flat head, star pin tamper-resistant, 18-8 stainless sheet metal screw in the 100 piece box. If you are matching an existing installation, the things to confirm against what is in the door or cover are the #14 diameter, the 1-1/4 inch length, and the pin-in-star recess, since a plain Torx of the same size looks nearly identical in a bin.

One hundred pieces per box, all #14 x 1-1/4 inch flat head star pin tamper-resistant stainless screws. That quantity is sized for a maintenance crew securing a run of covers or enclosures across a building rather than a one-off repair, and buying the box keeps a single security bit and a single screw type standardized across the facility.