Protect Property.
Prevent Theft.
Industrial Tamper-Resistant Fasteners & Installation Tools
Protect equipment, signs, utility infrastructure, and facilities with industrial-grade tamper-resistant fasteners and installation tools. Trusted by contractors, municipalities, utilities, schools, and industrial professionals.
✓ Family Owned | ✓ Ships from Texas | ✓ Industrial Grade | ✓Fast Order Processing
Tri-Groove Nuts
Industrial-grade tamper-resistant fasteners and installation tools.
Tamper-resistant security nuts
Shop Our Products
Installation Tools
Matching installation tools
Breakaway Nuts
Permanent security nuts
Not sure which Tri-Groove Nut you need? Use this quick guide before ordering.
Featured Products
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
This #30 Tri-Groove Installation Socket is engineered for reliable installation and removal of tri-groove tamper-proof security nuts. Designed for a precise fit, it helps prevent slippage, stripping, and damage during installation—making it ideal for both professional and industrial use.
Built for durability and consistent performance, this socket ensures secure fastening in applications where theft deterrence and safety matter most.
Compatible Thread Sizes
5/16"-18
3/8"-16
7/16"-14
M8 × 1.25
M10 × 1.5
Compatible with corresponding Tri-Groove security nuts.
Product Details
Designed specifically for tri-groove tamper-proof security nuts
Precision-machined for a secure, accurate fit
Built for repeated professional use
Suitable for professional, commercial, and DIY applications
Required tool for proper installation and removal
Why Use a Tri-Groove Installation Socket?
The #30 Tri-Groove Installation Socket is designed to properly engage Tri-Groove security nuts for safe installation and removal. Using the correct socket helps reduce slipping, protects both the fastener and the tool, and ensures a secure fit.
✓ Volume Discounts Available
Multiple technicians?Save when purchasing 2, 3, or 4 installation sockets for your maintenance team or service vehicles.
Industrial Security Fastener for Utilities & Commercial Applications
Protect equipment, signs, fixtures, and other valuable property with 3/8"-16 Break-Away Shear Nuts made from durable Zamak 5 zinc alloy. These one-way security nuts are designed with a hexagonal installation head that separates once the proper tightening torque is reached.
After the hex head breaks away, a smooth, tamper-resistant cone remains, making the nut difficult to grip or remove with standard tools. These shear nuts are intended for one-time installation. After the hex head breaks away, removal generally requires a grinder or other destructive removal method.
Available in packs of 2, 5, 8, 10, 12, 25, 50 or 100.
Specifications
Thread Size: 3/8"-16 UNC
Fastener type: Break-away shear nut
Material: Zamak 5 zinc alloy
Installation style: Hex head shears away during final tightening
Finished appearance: Smooth, tamper-resistant cone
Designed for permanent and security-sensitive installations
No specialty installation socket required
Bolt or threaded stud is not included
Select your desired quantity before adding to cart
How Break-Away Nuts Work
Install the nut using a standard wrench or socket that fits the hexagonal head. As the nut is tightened, the upper hex section is designed to shear away at its predetermined breaking point. The remaining cone-shaped portion cannot be easily gripped with ordinary tools.
Because the head is intended to break away, these nuts are generally best suited for installations that do not require frequent removal or adjustment.
Common Applications
3/8"-16 break-away nuts may be used for:
Outdoor signs and mounting hardware
Utility equipment and enclosures
Trailer and transportation equipment
Fencing and gates
Public fixtures
Machinery guards
Security barriers
Commercial equipment
Property-protection installations
Important Installation Information
Confirm that 3/8"-16 is the correct thread size for your bolt or threaded stud before ordering.
Thread the nut on by hand first to ensure proper alignment. Tighten it using the appropriate standard wrench or socket until the hexagonal installation head separates. Do not continue attempting to tighten the remaining cone after the head has sheared away.
Break-away nuts are designed to discourage removal. Removal may require cutting, drilling, grinding, or another destructive method.
Important Notes
Designed for permanent installations
Removal typically requires destructive methods such as grinding or cutting
Once installed, these nuts are intended to be difficult to remove
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: 3/8"-16 UNC
Material: Natural Zamak 5 Zinc Alloy
Compatible Bolt Thread: 3/8"-16 UNC
Matching Installation Socket: Requires a #30 Tri-Groove Installation Socket (Sold Separately)
Reusable: Yes, with the matching #30 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 #30 Tri-Groove Installation Socket (Sold Separately)
Helps deter unauthorized removal
Suitable for indoor and outdoor installations
What’s Included
Each package includes:
3/8"-16 Tri-Groove tamper-resistant nuts
Quantity varies by the option selected
Installation Notes
Requires a #30 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