Manufacturer of the world's most secure fasteners

Patented | Never in Stores

Security. Personalized.

KEY-REX® Custom Manufactured Security Bolts, Screws & Nuts

Exclusive-to-you design that’s engineered for zero-theft.
100% made-to-order, right here in Gilbert, Arizona.

Key-Rex® Bolt & Driver Bit Shown with one of over 55 billion possible Key-Rex® drive configurations.

As unique as your fingerprint.

More secure than any tamper-proof screws on the market.

The Key-Rex® fastener can’t be removed without its perfectly matched driver bit.

unique tamperproof keyway by Bryce, our professional services are guaranteed meaning we will not rest until the job is done correctly & your property is safe & secure, plus you cannot buy our keys anywhere in stores so criminals will not be able to easily access your property, Bryce Security custom screws & nuts, nuts & screws for added security | Custom Security Nuts and Bolts Keyways anti theft, resistant to criminals & civilians alike our tamper proof products are the best on the market with no comparable competition, we are custom manufacturers of our own security products such as screws & fasteners, the best high security and customized screws & fasteners on the market | tiny screws, masonry screws, miniature screws, sheet metal screws, concrete screws, wood screws, & more a wide variety of keyways, perfect for every application, if you cannot find the right nuts, screws, or other product for your needs we will design a custom fastener for you, plus all of our manufacturing is done right here in the USA, the best security for your property with screws & nuts & fasteners, Bryce Security Screws & Other Products, nuts, screws | Security Nuts and Bolts
transportation manufacturer, get drivers for your security products such as screws & nuts specifically designed for your company so no one else can access or vandalize your property, with Bryce Fastener keeping your property safe & secure has never been easier, plus we design all of our nuts and other products in house so you can trust that no one else will have access, vandal resistant bolts nuts and screws, high security and anti theft bolts nuts and screws

Customer Testimonial

It’s uniquely our own — only we have the key.

I never knew we could have security screws with a drive designed specifically for our company. Key-Rex saves us time, money, and headaches, no longer having to constantly replace stolen and damaged items. Thank you for helping me impress my boss!

Jim Haskins Product EngineerTransportation Manufacturer
Dearborn, Michigan

Total Control.KEY-REX® You control how many keys there are and ever will be.

Any Industry.

The value of custom security pays for itself.

If you've ever had a loss, you know.

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Any Security Need.

Choose the right security fastener for your unique application.

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

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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

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locking tamper proof custom screws locking tamper proof nuts & screws locking bolts locking tamper proof fasteners & screws & much more, all made right here in the USA with that quality American craftsmanship our customers need, you can trust & remain confident that since we craft our own locking tamper proof products that each product is designed perfectly & guaranteed to keep your property tamper proof & protected from common thieves, you can trust Bryce for your locking fastener needs, no one makes security screws, nuts, or tamper proof screws & nuts quite like Bryce Fastener, all of our nuts, screws, & other products are designed to keep thieves out of your stuff, preventing any damage to the system

Security Fasteners - Tamper Proof Screws, Security Screws, Anti Theft Nuts, Vandal Proof/Tamper Resistant Locking Bolts

All tamper-proof screws are not created equal. The problem with most other security screws is that they are not actually as secure as one might think.

The fact is, except for Bryce Fastener's, most so-called “tamper proof screws” are not at all what they claim. Any person can go into almost any hardware store and buy a special tool or driver to so called tamper proof screws that most people believe are secure, locking, and thief resistant. There are even commonly available types of driver bits to remove those so-called “one-way screws”. So what is your alternative for true peace of mind? Truly unique tamper proof screws made by Bryce Fastener.

Bryce is a U.S. custom screw manufacturer located in Gilbert, Arizona. The tinker resistant security screws, tamper-proof bolts, tamper-resistant screws, security nuts and other security fasteners Bryce manufactures are simply the finest in the world. Tamper resistant fasteners with revolutionary head designs are all we manufacture and our security bits are not available on the market.

All Industries Can Benefit

Virtually every industry, from retail stores to governmental security has issues with theft, loss prevention and vandalism. Many of them, after suffering serious losses, put an end to their issues with Bryce Fastener’s tamper proof bolts, screws, and nuts. Bryce fasteners are perfect for a wide variety of security applications, from the internal workings of a medical device with our miniature fasteners, to a product display, all the way up to gas and oil pipelines with our Key Rex Structural Nut with security cap. We have even developed the absolute best concrete security screws on the planet. Best of all, if you don't see a style of security bolts, security nuts, screws, or fasteners on our site that fit your needs, we'll design one for you. After all, we are the manufacturer, and we have the finest designers of screws and fasteners in the industry.

Many Electronics Manufacturers

Many electronics manufacturers and product engineers need efficient, cost-effective means to protect components from prying hands, tools and eyes. They find the Bryce Key Rex screws and nuts nearly 100% effective in their applications, down to the tiniest sizes of screws. This is essential in protecting themselves from liability. It’s also important when they need to keep proprietary information out of the hands of others. Traditional tamper resistant screws would not do the job, as their bits are available in stores, but our revolutionary designs and limited availability of our security bits, ensure the job is done right.

Retail Organizations

Retail organizations need simple, effective, affordable means to prevent loss from theft and wreckage of their products and premises. Bryce tamper proof screws and tinker resistant fasteners have prevented countless cases of loss at a wide range of stores around the world.

Universities Everywhere

Universities everywhere protect costly classroom equipment with the world’s finest and most unique anti-theft screws, locking nuts and bolts made by Bryce. Time after time, we receive reports from schools when they discover all the screws removed from a securing device except the one or two security screws from Bryce. Those one or two screws were all that was needed to prevent costly items from being detached and carried away. We've also heard of cases where a few Bryce wood screws saved the day, such as when our screws were the only things that kept several wooden benches from ending up in the school pond.

Utility Companies

Utility companies rely on Bryce tamper resistant screws and tamper proof fasteners to prevent theft of expensive equipment such as miles of copper wire. They also rely on large numbers of Penta Bolts, security bolts, and tamperproof screws from Bryce to effectively prevent manhole covers and other access points from being breached.

A Bryce Fastener screw should be your best first line of defense against loss, theft, unauthorized entry and destruction of property. Bryce manufactures some of the only truly tamper proof screws in the world. If Bryce doesn’t have what you’re looking for, or you have a question, give us a call. We custom design and manufacture screws and other tamper proof fasteners to fit almost any need.