STAINLESS STEEL HEXALOBULAR + PIN BUTTON SECURITY SCREWS

Hexalobular + Pin Button Security Screws — Hexalobular + Pin button security screws use a six-lobe recess with a raised centre pin standing proud in the middle, so a standard Torx bit bottoms out on the pin before its lobes can engage — only a bit or key machined with a matching centre bore will seat and turn it. The button head gives a rounded, low-profile dome that sits above the surface rather than pulling flush, giving a good bearing area on softer panel materials without needing a countersunk pilot hole. This machine-thread version is fitted into a tapped hole, nut, or threaded insert rather than forming its own thread, so it's the right choice wherever the mating component is already threaded — cabinet frames, welded brackets, or a captive nut behind a panel. These screws turn up wherever a fixing is exposed to the public or to unsupervised access but doesn't need to disappear flush with the surface: playground and street furniture, transport interiors, vending and amusement equipment housings, and retail or leisure fit-outs where casual tampering or theft of fixtures is a real risk. Grade choice follows the environment rather than the security function itself — an A2 (304-equivalent) screw is adequate for indoor or sheltered outdoor use, while A4 (316-equivalent) is worth the extra cost wherever the fixing sees coastal air, road salt, washdown chemicals, or permanent outdoor exposure, since the added molybdenum content resists pitting corrosion that A2 can't match over time. Sizing follows the same logic as any machine screw: diameter and length are set by the thickness of the fixed material and the depth of the tapped hole or insert, with enough thread engagement to reach full strength without bottoming out. The main decision specific to this range is head style — button suits a proud, rounded finish, while the countersunk or raised countersunk versions in the same recess family are better where the head must sit level with, or close to, the surrounding surface.

FAQs
How is tamper-resistance maintained if bits are lost or duplicated?
Treat matching bits and keys as controlled items on site. The tooling itself is the security barrier here rather than a mechanical lock, so losing control of it undermines the whole point of specifying a security fastener.

Why choose a button head over a countersunk head?
A button head suits softer or thinner materials and avoids the need to countersink the fixing hole. Choose the countersunk version instead wherever a flush, snag-free finish is the priority, such as public walkways or safety-critical surfaces.

Is a self-tapping version available?
Yes. Hexalobular + Pin Button Self Tapping Security Screws share the same head and recess but form their own thread directly into plastic, timber, or thin metal, without needing a tapped hole, nut, or insert.

What tool drives this screw?
A Hexalobular + Pin Security Drive Bit for power-tool or bit-holder use, or the equivalent Security Wrench Key for hand-driving where more control or leverage is needed.