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The Precision Alliance

Tamper Resistant Fasteners

Tamper Resistant Fasteners

Hexalobular Socket Button Head Cap Screws, One Side Pan Head Screws, Two Hole Pan Head and Triwing Pan Head Screws available in sizes M3-M8. Tamper resistant fasteners which cannot be tightened or removed with a regular wrench are useful for machinery, tools, equipment, and device disassembly prevention, as well as theft and tampering prevention.

SRBS - Hexalobular Socket Button Head Cap Screw with Pin

  • Socket button head cap screw with pin in the center of the hexalobular hole.
  • Cannot be tightened or removed with a regular wrench. Useful for machinery, tools, equipment, and devices disassembly prevention, and theft and tampering prevention.
  • A specialized wrench SRX is required for tightening and removal.
  • Material/Finish: SUS304
  • The Hexalobular Hole is regulated by JIS B 1015:2201 (ISO 10664-1999) "Screws with usable Hexalobular Hole".

SRHS - Hexagon Socket Button Head Cap Screw with Pin

  • Socket button head cap screw with pin in the center of the hexagon socket hole.
  • Cannot be tightened or removed with a regular wrench. Useful for machinery, tools, equipment, and devices disassembly prevention, and theft and tampering prevention.
  • A specialized wrench SRH is required for tightening and removal.
  • Material/Finish: SUS304

SROS - One-side Pan Head Machine Screw

  • When tightening, a standard SROT screwdriver may be used; when loosening this is not possible. Useful for machinery, tools, equipment, and devices disassembly prevention, and theft and tampering prevention.
  • A specialty tool is required for removal.
  • Material/Finish: SUS304

SRTS - Two-hole Pan Head Machine Screw

  • Two-Hole Pan Head Machine Screw Excellent Design; can be used as a finish trim.
  • Cannot be tightened or removed with a regular wrench. Useful for machinery, tools, equipment, and devices disassembly prevention, and theft and tampering prevention.
  • A Specialized Bit SRTB and the Specialized Magnetized Driver SRD is required for tightening and removal.
  • Material/Finish: SUS304

SRWS - Triwing Pan Head machine Screw

  • A standard screwdriver will spin free in the triangle hole when used to remove these screws.
  • Cannot be tightened or removed with a regular wrench. Useful for machinery, tools, equipment, and devices disassembly prevention, and theft and tampering prevention.
  • A Specialized Bit SRWB and the Specialized Magnetized Driver SRD is required for tightening and removal.
  • Material/Finish: SUS304

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