Stainless Steel Security Bolts

304 stainless steel hex head screw with column, featuring a hexagonal slot and a central anti-tamper post. It can only be driven with a specialized hollow hex bit; standard Allen wrenches, flathead, or Phillips screwdrivers cannot fit. Designed for use in equipment requiring anti-tampering and anti-disassembly protection.

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Product Description

Ordinary cross and hexagonal screws can be easily unscrewed with a screwdriver at a hardware store for a few yuan, which cannot prevent people from entering. Plum blossom screws with pillars are specifically designed to prevent such incidents. It added a protruding pillar in the center of the plum blossom trough. A regular plum blossom wrench does not have a center hole and cannot be inserted; A Phillips screwdriver cannot enter, nor can an Allen key. To dismantle it, you must use a center hole ring wrench (also known as a hollow ring wrench or anti disassembly wrench). Most people do not have this tool at hand, so they will not twist it casually.

Name	Stainless Steel Security Bolts
Material	Stainless Steel
Standards	GB,DIN, BSW, JIS, UNC, UNF, Non-standard, Customized Drawing
Thread	Metric Coarse, Metric Fine, UNC, UNF, BSW, BSF.
Sizes	M2-M10Metc
Finish	Plain/Black/Other
Price	0.03usd/pcs-0.50usd/pcs
MOQ	Stardard item(Usually little hundred-little thousand)/determined if non-standard

Product Feature

Step limit, correct assembly misalignment: The step surface between the smooth rod and the thread is perpendicular. During assembly, the step surface contacts the end face of the first workpiece, while the thread engages only the second workpiece. This ensures a fixed gap between the two layers of workpieces, preventing deformation from over-tightening.

Torx slot, no slip under high torque: The Torx (star) slot contact surface is linear, ensuring a snug fit when the bit is inserted. When torqued up to 5N·m (M4 size), the slot remains undistorted. Suitable for pneumatic or electric assembly lines, the bit lifespan is 2-3 times longer than that of Phillips slots.