US security screws manufacturer 100% MADE IN THE USA

Call us: 480-503-3801

99.9998% Effective World's Most Secure Fastener

key-rex tamper-proof nuts
Bryce Exclusive

Key-Rex® Nut


The most secure nut anywhere.

Key-Rex® nuts are the world's most secure, tamper-proof nuts on the market. Every set of Key-Rex® nuts are custom "keyed" for the client. Only the client has the sockets to fit their custom set which are designed to be nearly impossible to remove without the socket.

Key-Rex® shapes are created using an encryption process that builds a shape out of millions of variables and defines a unique code for each part. Customers pay for a one-time key code tool and licensing agreement.

Higher torque with Raptor™ Security Head

When manufactured with the optional Raptor™ Head, the Key-Rex® can handle 20% more torque and provides more grip than any other security nut on the market.

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

Stops Theft.

The applications are unlimited

  • Retail electronics
  • University electronics
  • OEM
  • Public utilities
  • Prisons, jails, security facilities
  • Bank credit card, ATM
  • Public bike-share
  • Solar panels
  • Security fencing
  • Nuclear plants
  • Military/Government
  • Museums
  • Custom high-security applications

Get a FREE Key-Rex® Nut Quote

Each customer has different needs. Let us help you get protected.

Click for more info about Key-Rex® Nut Theft-Proof Security Nuts, or for all Bryce products, visit our products page.

1230 N. Mondel Dr. Gilbert, Arizona 85233 Tel: 480-503-3801 Fax: 480-503-3834 Email: Facebook

Bryce Fastener is the world leader in high security locking bolts and fasteners, security screws, tamper proof and tamper-resistant screws.

KEY-REX™, Keyed-Lok®, Penta-Plus™, Hex-Pin™, and Tam-6lobe™ are registered trademarks of Bryce Fastener Mfg.
TORX® is a registered trademark of Acument Intellectual Properties, LLC
Copyright Bryce Fastener Mfg., Inc., 2019. All Rights Reserved. Prices Subject to Change Without Notice. Zero Theft is not Guaranteed.