1/2-13 Zamak 5 Tri-Groove tamper-resistant security nut
#40 Tri-Groove installation socket for 1/2-13, M12, and M14 security nuts
Standard hex nut compared with a 1/2-13 Zamak 5 Tri-Groove tamper-resistant security nut
Tri-Groove tamper-resistant security nut installed on a threaded bolt against wood
Two 1/2-13 Zamak 5 Tri-Groove tamper-resistant security nuts
Five 1/2-13 Zamak 5 Tri-Groove tamper-resistant security nuts
Eight 1/2-13 Zamak 5 Tri-Groove tamper-resistant security nuts
Twelve 1/2-13 Zamak 5 Tri-Groove tamper-resistant security nuts
Twenty-five 1/2-13 Zamak 5 Tri-Groove tamper-resistant security nuts
Fifty 1/2-13 Zamak 5 Tri-Groove tamper-resistant security nuts
One hundred 1/2-13 Zamak 5 Tri-Groove tamper-resistant security nuts
1/2-13 Zamak 5 Tri-Groove tamper-resistant security nut
#40 Tri-Groove installation socket for 1/2-13, M12, and M14 security nuts
Standard hex nut compared with a 1/2-13 Zamak 5 Tri-Groove tamper-resistant security nut
Tri-Groove tamper-resistant security nut installed on a threaded bolt against wood
Two 1/2-13 Zamak 5 Tri-Groove tamper-resistant security nuts
Five 1/2-13 Zamak 5 Tri-Groove tamper-resistant security nuts
Eight 1/2-13 Zamak 5 Tri-Groove tamper-resistant security nuts
Twelve 1/2-13 Zamak 5 Tri-Groove tamper-resistant security nuts
Twenty-five 1/2-13 Zamak 5 Tri-Groove tamper-resistant security nuts
Fifty 1/2-13 Zamak 5 Tri-Groove tamper-resistant security nuts
One hundred 1/2-13 Zamak 5 Tri-Groove tamper-resistant security nuts

1/2"-13 Tri-Groove Tamper-Resistant Security Nuts

from $9.99

Industrial Security Fastener for Utilities & Commercial Applications

Tri-Groove tamper-resistant security nuts are designed to help deter unauthorized removal using standard hand tools Their unique tri-groove design requires a matching installation socket, making them ideal for utilities, schools, municipalities, commercial facilities, trailers, gates, and other security applications.

Specifications

Thread Size: 1/2"-13 UNC
Material: Natural Zamak 5 Zinc Alloy
Compatible Bolt Thread: 1/2"-13 UNC
Matching Installation Socket: Requires a #40 Tri-Groove Installation Socket (Sold Separately)
Reusable: Yes, with the matching #40 Tri-Groove Installation Socket.
Typical Applications: Electrical Panels, Utility Equipment, Commercial Fixtures, Signage, Municipal & Industrial Installations

Features

  • Manufactured from Natural Zamak 5 Zinc Alloy

  • Designed for industrial security applications

  • Requires a #40 Tri-Groove Installation Socket (Sold Separately)

  • Helps deter unauthorized removal

  • Suitable for indoor and outdoor installations

What’s Included

Each package includes:

  • 1/2"-13 Tri-Groove tamper-resistant nuts

  • Quantity varies by the option selected

Installation Notes

  • Requires a #40 Tri-Groove Installation Socket (sold separately)

  • Not compatible with standard hex sockets or wrenches

  • Confirm the bolt thread size before ordering

Important Notes

  • Intended for security applications rather than frequent removal

  • Product appearance may vary slightly by production batch

  • Choose the quantity needed from the product options

Pack Quantity:

Industrial Security Fastener for Utilities & Commercial Applications

Tri-Groove tamper-resistant security nuts are designed to help deter unauthorized removal using standard hand tools Their unique tri-groove design requires a matching installation socket, making them ideal for utilities, schools, municipalities, commercial facilities, trailers, gates, and other security applications.

Specifications

Thread Size: 1/2"-13 UNC
Material: Natural Zamak 5 Zinc Alloy
Compatible Bolt Thread: 1/2"-13 UNC
Matching Installation Socket: Requires a #40 Tri-Groove Installation Socket (Sold Separately)
Reusable: Yes, with the matching #40 Tri-Groove Installation Socket.
Typical Applications: Electrical Panels, Utility Equipment, Commercial Fixtures, Signage, Municipal & Industrial Installations

Features

  • Manufactured from Natural Zamak 5 Zinc Alloy

  • Designed for industrial security applications

  • Requires a #40 Tri-Groove Installation Socket (Sold Separately)

  • Helps deter unauthorized removal

  • Suitable for indoor and outdoor installations

What’s Included

Each package includes:

  • 1/2"-13 Tri-Groove tamper-resistant nuts

  • Quantity varies by the option selected

Installation Notes

  • Requires a #40 Tri-Groove Installation Socket (sold separately)

  • Not compatible with standard hex sockets or wrenches

  • Confirm the bolt thread size before ordering

Important Notes

  • Intended for security applications rather than frequent removal

  • Product appearance may vary slightly by production batch

  • Choose the quantity needed from the product options

Frequently Bought Together
#40 Tri-Groove Installation Socket for 1/2-13, M12 & M14 Security Nuts #40 Tri-Groove installation socket for tamper-resistant security nuts Two #40 Tri-Groove installation sockets Three #40 Tri-Groove installation sockets Four #40 Tri-Groove installation sockets
#40 Tri-Groove Installation Socket for 1/2-13, M12 & M14 Security Nuts
from $48.00
Quantity:

Frequently Asked Questions

  • Tri-Groove security nuts help deter unauthorized removal by requiring a matching Tri-Groove Installation Socket. They are commonly used on utility equipment, electrical panels, trailers, gates, signage, commercial fixtures, and municipal installations.

  • These nuts are designed for use with a standard 1/2"-13 UNC bolt. Always verify your bolt thread size before ordering.

  • Yes. These security nuts require the matching #40 Tri-Groove Installation Socket, sold separately. Standard sockets and wrenches will not properly engage the Tri-Groove design.

  • Yes. When used with the matching Tri-Groove Installation Socket, the nuts can be installed and removed for maintenance or service while helping deter unauthorized removal.

  • Yes. These Tri-Groove security nuts are suitable for many indoor and outdoor applications. For highly corrosive environments, consider choosing a stainless steel version if available.

  • These security nuts are commonly used on:

    • Electrical panels

    • Utility equipment

    • Commercial fixtures

    • Signage

    • Gates and fencing

    • Trailers

    • Municipal installations

    • Industrial equipment