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We Are The Security Screw Solution Specialists. 

We stock all security screw types including snake eyes screws, security lock nut, metric security screws, torx head, pin screws, socket cap screws, Tri-Wing, Opsit reverse thread, security screw removal tools and more. See the thousands of innovative styles and sizes of security screws.

Mack Fasteners Inc. is the World Leading supplier of Tamper Proof Screws.

 
security screw screws product
tamperproof tamper proof security screw screws snake eye

SNAKE EYES® SPANNER

The original Snake Eyes® Spanner requires matching driver bit reducing the chances of unauthorized removal. Available in 18-8 stainless steel. 

 

METRIC SNAKE EYES®

Pan head machine screws. Oval head machine screw, flat head machine screws

tamperproof tamper proof security screw screws Phillips Pin-Head

PHILLIPS PIN-HEAD

Traditional Phillips drive with tamper-resistant pin added for security. Easy to drive and remove with matching tool. (Cannot be removed with Phillips Screwdrver)
tamperproof tamper proof security screw screws Socket Pin-Head

SOCKET PIN-HEAD

Engineered for a high degree of tamper-resistance offering positive engaging, high torque transmission while resisting cam-out and tool wear. 

 

METRIC SOCKET SECURITY

Metric socket pin-head, Button head cap screws, Flat head cap screws.

Torx® Pin-Head tamperproof tamper proof security screw screws

TORX® PIN-HEAD

Maximum torque transfer and positive tool engagement means easier drive installation with less pressure and slippage.

 

METRIC TORX®

Metric Torx® Pin-Head, Button head machine screw, Flat head machine screw.

Tri-Wing® tamperproof tamper proof security screw screws

TRI-WING®

Economical Tri-Wing® tamper-resistant screws are the common choice for high volume assembly operations while offering a minimal degree of security...more

Opsit Reverse Thread tamperproof tamper proof security screw screws

OPSIT REVERSE THREAD

Opsit™ is a reverse thread sheet metal screw that installs counter-clockwise, thus, tightens if removal is attempted.

 

ONE WAY SEX BOLT

One Way Sex Bolts are only available as 10-24 Truss Heads in 18-8 Stainless Steel only. They may be ordered as a complete set, consisting of a male and female part, and sized according to the Total Partition Size.

One-Way Slotted tamperproof tamper proof security screw screws

ONE-WAY SLOTTED

Popular design installs with standard screwdriver. Reverse side cammed out to prevent unauthorized removal. Machine and sheet metal screws available.

TP3® Security to the third power tamperproof tamper proof security screw screws

TP3® SECURITY TO THE THIRD POWER

We've added TP3® to our powerful line-up of security fasteners. Its new triangular recessed drive offers three times the security ...more

Standard Non-Tamperproof Torx® tamperproof tamper proof security screw screws

STANDARD NON-TAMPERPROOF TORX®

We know it's hard to find Standard Torx® screws in stock. So we've added these non-tamperproof screws to our line. Available in pan-head she...more

Spanner Nut / Removable Security Nut tamperproof tamper proof security screw screws

SPANNER NUT / REMOVABLE SECURITY NUT

Zinc Alloy (non-ferrous rust resistant) 

Drilled Head or Twin Hole - This versatile security fastener can do almost any job. A functional tamper proof screw with an aesthetically pleasing appearance. Ideal for public restrooms, telephone booths and many other applications.

Breakaway Nuts / Non-Removable tamperproof tamper proof security screw screws

BREAKAWAY NUTS / NON-REMOVABLE

Hex nut breaks away when nut is tightened leaving only the tamper-resistant conical portion. No special tool is required - uses standard wrench.

Tools and Kits tamperproof tamper proof security screw screws

TOOLS AND KITS

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