Manufacturer of the world's most secure fasteners


O-Ring Security Screws

Security and Sealed Protection

Securely Sealed

O-Ring security screws in sizes 4/40 (M3) 5/8-11 (M16).

These have a concave groove under the head about ½ the height of the O-Ring, which permits a moisture seal when tightened. There are two ways we manufacture O-ring security screws based on your required quantity. For quantities of 100 minimum, we lathe cut the groove under the head, and then add the O-Ring. For 2,500 pieces or more, we form the groove in the fastener as it’s being headed then add the O-Ring before threading. 

Why Choose a High-Security O-Ring screw?

One industry who benefits from using High-Security O-Rings is the medical device industry. Security is critical for electromechanical medical devices that regulate the body. Securing the outside of the device with one of our patented security drives protects the intellectual property inside, while also sealing the contents from contamination.

Made in 18-8 Stainless Steel

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.

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

Get Started

Choose the right fastener for your needs.

Compare our other exclusive security fasteners. Never sold in stores.