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Standard screws invite tampering. Whether you’re securing electronics enclosures, public fixtures, or anti-theft installations, a fastener that can’t be removed with a common screwdriver is a meaningful deterrent. These A2 304 stainless steel pan head Security Torx machine screws use a pin-in Torx (TR) drive that requires a specialized Security Torx driver — standard Torx bits will not engage due to the center pin. The natural stainless finish provides corrosion resistance without the added cost of a black oxide coating.
The pan head profile provides a wide, flat bearing surface that distributes clamping force evenly across panels and housings. Available in M2, M2.5, M3, and M4 with 24 size combinations from M2×4mm (0.16”) to M4×20mm (0.79”). Each pack contains 20 pieces — select your preferred size using the Size option above.
Typical applications include electronics enclosures and device security (M2–M3), public fixture and display hardware (M3–M4), anti-theft installations and access panels, kiosk and vending machine assembly, and any application where unauthorized removal of fasteners must be prevented.
| Material | A2 Stainless Steel (304 / 18-8) |
|---|---|
| Finish | Natural stainless (no coating) |
| Thread Standard | ISO Metric |
| Thread Diameters | M2, M2.5, M3, M4 |
| Head Style | Pan Head (Round Head) |
| Drive Type | Security Torx (TR / pin-in Torx) — TR6 (M2) / TR8 (M2.5) / TR10 (M3) / TR15 (M4) |
| Available Lengths | 4mm (0.16”), 5mm (0.20”), 6mm (0.24”), 8mm (0.31”), 10mm (0.39”), 12mm (0.47”), 16mm (0.63”), 20mm (0.79”) — varies by diameter |
| Pack Size | 20 pcs (all sizes) |
| Screw Type | Machine screw (requires tapped hole or nut) |
| Length Measurement | Excluding head (shaft length only) |
| Corrosion Resistance | Excellent — suitable for indoor and light outdoor use |
| Common Applications | Electronics enclosures, public fixtures, display hardware, anti-theft installations, kiosks, and access panels |
A Security Torx screw (also called Torx TR, Tamper-Resistant Torx, or pin-in Torx) has a standard 6-point star drive with a center pin that prevents standard Torx drivers from engaging. A matching Security Torx (TR) driver with a center hole is required to drive or remove these screws. This makes them a practical deterrent against unauthorized removal.
A Security Torx (TR) driver with a center hole is required. Standard Torx (T) drivers will not fit due to the center pin. Driver sizes: M2 = TR6, M2.5 = TR8, M3 = TR10, M4 = TR15. Always verify the correct TR size for your specific screw before purchasing a driver.
A2 is the most common grade of austenitic stainless steel, equivalent to 304 or 18-8 stainless. It offers excellent corrosion resistance, is non-magnetic in most conditions, and is the standard material for general-purpose stainless fasteners in electronics, fixtures, and light outdoor use.
A2 stainless steel provides strong corrosion resistance and will not rust under normal indoor conditions or light outdoor exposure. For marine, coastal, or highly corrosive environments, A4 (316) stainless is generally recommended. These screws are well-suited for electronics, public fixtures, and sheltered outdoor installations.
Measure the depth of the tapped hole or the thickness of the material being fastened. The screw length (excluding head) should engage at least 1.5× the thread diameter for a secure hold. Available lengths: 4mm (0.16”) to 20mm (0.79”) depending on the diameter. When in doubt, size up.
Yes — these are machine screws, not self-tapping. They require a pre-tapped M-series hole or a matching metric nut in the same thread size. They will not cut their own thread into plastic or metal.
A2 stainless steel typically has a tensile strength of around 500–700 MPa, suitable for light-to-medium clamping loads in electronics, panels, and fixtures. For critical load-bearing applications, verify the specific grade and consult torque specifications for the thread size.
Each pack contains 20 pieces. All 24 size combinations are sold in packs of 20. Select your preferred thread diameter and length using the Size option above.
