Metallics TP223SBC Screws 6-32 x 1/4 Btn Star Pin TR MS 18-8 (100 pcs)

The TP223SBC is a pin-in-star (pin-in-Torx) button head screw, so a standard Torx bit will not seat. You need a tamper-resistant star bit with a hollow center that clears the pin in the middle of the recess. That pin is the whole point of the head style: it keeps standard drivers and common bit sets out of the fastener once it is installed.

The TP223SBC is 18-8 stainless steel, which is the common 300-series austenitic grade used for general corrosion resistance. That holds up in damp interior spaces, exterior enclosures and washdown areas far better than plain or zinc-plated steel. For coastal salt spray or pool chemical exposure, 316 stainless is the step up.

Button head, so it sits proud of the surface with a low domed crown and a flat bearing face underneath. It needs a plain through hole, not a countersink. If the plate you are fastening is countersunk and you want the head level with the surface, a flat head screw is the correct style instead. The low profile of a button head is the usual choice where a protruding head could be grabbed or pried.

On fixtures and enclosures in public corridors, schools, transit areas and multi-family common space, a standard slotted or Phillips cover screw can be backed out with anything in a pocket. The TP223SBC uses a pin-in-star recess in 18-8 stainless, so the plate stays on unless someone has the specific hollow-center bit. It replaces a 6-32 x 1/4 inch cover screw one for one, since the thread and length are the same as the standard fastener.

Each pack is 100 pieces of the 6-32 x 1/4 inch pin star button head screw. For an MRO crib or a security integrator stocking tamper-resistant hardware, that covers a lot of cover plates, but note the matching hollow-center star bit is a separate item and is not part of the fastener pack.

Order Metallics TP223SBC. That number covers the 6-32 x 1/4 inch button head pin star tamper-resistant machine screw in 18-8 stainless, 100 to a pack. Useful for distributors cross-referencing: the thread, length, head style, drive and material are all bound to that single designation, so there is no separate finish or pack suffix to specify.