Manufacturer of the world's most secure fasteners

penta-nuts - tamper proof security nuts, tamper-resistant for security, exclusive to Bryce Security Fastener customers, the most grip you can find from anti theft nuts on the market | Penta Nuts High Security Locking Nuts | Bryce Fastener Bolts Screws and More | Best tamper-proof nuts on the market | Tamperproof nuts | Tamper and Vandal Proof Nuts



Exclusive to Bryce Customers

Penta-Nut™ Security Nuts - Like a Lock

Penta-Nut™ security nuts have the largest diameter compared to other available anti-theft nuts and security nuts, and with the added Raptor™ Security Head, no washer is needed. These high-security, 316 stainless steel, tamper-proof nuts, turn any bolt into a lock. 

  • The deep socket allows overrun of security bolts
  • Cone shape repels locking pliers
  • Compression ring binds and seals
  • Patents in U.S. and worldwide helps ensure security
  • A secure pentagon-profile recess provides high torque capability
Anti theft vandal proof raptor claws security technology is 20 percent tougher to remove than your average lock washers, Bryce's security products protect your property the right way, Penta Nuts are some of the best for security on the market | Penta Nut | Bryce Fastener Custom Hardware | Penta Nut from Bryce Fastener | Best Hardware on the Market | Give us a call today for a consultation with one of our experienced professionals

Higher Torque with Raptor™ Security Head

When manufactured with the optional Raptor™ Head, the Penta-Nut™ can handle 20% more torque, allowing for a wider range of applications. Also, by adding the Raptor™ Head, these tamper proof security nuts provide more grip than any other tamper proof nuts on the market. 

  • Radial gripping serrations flex downward with torque
  • Eliminates the need for a lockwasher
  • Larger diameter spreads the compressive load better

Configure Your Perfect Fastener

Fastener security — for everything possible.

Bryce Security Fasteners can be made in 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.

Tell us about your project and an expert will recommend the perfect protection to fit your needs and budget.

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Security Nuts - Innovation Like No Other

From tamper-proof nuts to specialized, custom-made locking nuts.

Patented Drives Only Available from Bryce Fastener | Never Sold in Stores