Manufacturer of the world's most secure fasteners

key-rex pipeline security nuts


Key-Rex® Wellhead Nut

Pipeline Anti-theft Protector Nut & Security Cap

Custom & Certified

Custom made to meet grade 2H nut specifications. Certified for the pipeline industry

  • HEAT TREATMENT:  Oil quench & Temper
  • HARDNESS:  RC 50-60
  • COATING: BLUE:  XYLAN 1070, 1024, FlouroKote#1
  • ASTM B117 SALT SPRAY:  1,000-4,000 hour
  • SIZES:  1/2-13 up to 2-8

7 Levels of Security

  1. Security Cap torqued 200 ft-lb
  2. Asymmetrical tri-pin pattern on Security Cap
  3. Proprietary Protector Nut keyway profile can’t be matched
  4. Protector nut handles extreme torque up to 800 ft-lb
  5. Unique driver bit engages very shallow keyway profile fins leaving nothing for thieves to grip onto
  6. Outer shroud spins freely frustrating thieves
  7. Hardened, heat-treated steel

Security Cap - Tough Exterior

More than meets the eye. A threaded, 200 ft-lb torqued security cap is only the beginning of the security features. This first barrier must be removed with the proprietary tri-pin end of the included driver bit. The asymmetrical pin pattern acts as a disguised security feature.

Protector Nut – Strong AND Unique

The strength of the Structural Nut assembly is the Protector Nut. The steel hardness and shallow keyway geometry gives would-be thieves nothing to grab onto. The perfectly matched driver bit locks onto the tapered keyway fins allowing incredibly high torque. This goes far beyond a simple vandal resistant nuts. This security nut has been designed and manufactured to defend against well-planned and well-manned attacks.

Enigma Key Coding – 131 billion keyway variations. These twists and tapers of the keyway can only be replicated by the same machine that created the original key-code. Any counterfeit wrench can not engage sufficiently to apply the required breakout torque.

Configure Your Perfect Fastener

Fastener security — for everything possible.

Key-Rex can be made for virtually any fastener type, any size, any metal, any coating, and more. From galvanized metric bolts for harsh coastal outdoor environments to heat-treated, micro screws for data center security.


Whatever you’re working on, Bryce has you covered.

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