Metallics TP119SBC Screws 1/4-20 x 1-1/4 Btn Hx Pin TR M (100 pcs)

It's a tamper resistant hex pin drive, meaning the socket has a post in the center. A standard hex key or hex bit will not seat on it. You need a pin-in-hex (hex pin) driver bit sized to the 1/4-20 button head screw, so plan on having that bit on the job before install.

The pin in the center of the socket blocks a common hex key, so the fastener cannot be backed out with tools a tenant or passerby is carrying. That is the reason to spec it on electrical enclosure covers, device plates in public areas, transit and restroom fixtures, and equipment guards. If the panel is behind a locked door or inside a secured room, a standard 1/4-20 button head socket screw does the same mechanical job without the special bit.

100 pieces per pack. For an MRO or facilities crew standardizing on one tamper resistant fastener across enclosures, covers, and guards, that is enough to cover a run of openings from a single box rather than mixing drives on the same site.

Order Metallics TP119SBC. That single part number covers the 1/4-20 by 1-1/4 inch button head hex pin tamper resistant screw in the 100 piece pack, so there is no size or finish suffix to add on the order.