Button Head Torx Security Machine Screw Bolt Screws ...
3. Product Descriptions: The stainless steel machine screw has a plain finish and a button head with a pin-in-star drive. Stainless steel resists corrosion and may be magnetic. The pin-in-star drive has a six-pointed indentation with a center pin that resists tampering by requiring a special driver to tighten or loosen the screw.
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