About Nuts, Materials, and Finishes
More
Tamper-Resistant Breakaway Nuts



The most tamper-resistant nuts we offer, these have a hex head that breaks away upon tightening, leaving a non-removable cone. They can be installed using a standard wrench. Use them to reduce the risk of unwanted removal for objects in public spaces such as signs, lighting fixtures, and displays.
Zinc alloy and zinc-plated alloy steel nuts are corrosion resistant in wet environments.
18-8 stainless steel nuts have good chemical resistance and may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
Thread Size | Wd. | Ht. | Ht. After Installation | Breaking Torque, in.-lbs. | Pkg. Qty. | Pkg. | |
Zinc-Plated Alloy Steel | |||||||
---|---|---|---|---|---|---|---|
3/4"-10 | 1 1/4" | 1" | 13/32" | 1,500 | 100 | 000000000 | 0000000 |
18-8 Stainless Steel | |||||||
1/4"-20 | 9/16" | 15/32" | 7/32" | 95 | 5 | 000000000 | 00000 |
5/16"-18 | 5/8" | 1/2" | 7/32" | 130 | 5 | 000000000 | 00000 |
3/8"-16 | 3/4" | 37/64" | 1/4" | 245 | 5 | 000000000 | 00000 |
1/2"-13 | 1" | 3/4" | 11/32" | 405 | 100 | 000000000 | 000000 |
5/8"-11 | 1 1/8" | 51/64" | 3/8" | 510 | 50 | 000000000 | 000000 |
Tamper-Resistant Tri-Groove Nuts

Tri-groove nuts are narrower than sloped and drilled spanner nuts to fit in tight spaces. Install with a tri-groove socket bit and either a drive handle or an open-end wrench (all sold separately). Use them to reduce the risk of unwanted removal for objects in public spaces such as signs, lighting fixtures, and displays.
Zinc-plated steel nuts are coated to protect the steel from corrosion in wet environments.
316 stainless steel nuts won’t corrode from water, chemicals, or salt spray.
For technical drawings and 3-D models, click on a part number.
Nuts | Tri-Groove Socket Bits | Drive Handles | Open-End Wrenches | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Dia. | Ht. | Pkg. Qty. | Pkg. | Each | Each | Each | ||||
Zinc-Plated Steel | |||||||||||
10-24 | 0.64" | 0.265" | 25 | 000000000 | 000000 | 0000000 | 000000 | 0000000 | 000000 | 000000 | 00 |
10-32 | 0.64" | 0.265" | 25 | 000000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
1/4"-20 | 0.64" | 0.265" | 25 | 000000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
5/16"-18 | 0.83" | 0.345" | 25 | 000000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
3/8"-16 | 0.83" | 0.345" | 25 | 000000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
316 Stainless Steel | |||||||||||
10-24 | 0.65" | 0.265" | 10 | 000000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
10-32 | 0.65" | 0.265" | 10 | 000000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
1/4"-20 | 0.66" | 0.265" | 10 | 000000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
1/4"-28 | 0.65" | 0.265" | 10 | 000000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
5/16"-18 | 0.83" | 0.345" | 10 | 000000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
5/16"-24 | 0.83" | 0.35" | 5 | 000000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
3/8"-16 | 0.83" | 0.345" | 10 | 000000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
3/8"-24 | 0.83" | 0.35" | 5 | 000000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
7/16"-14 | 0.83" | 0.34" | 1 | 000000000 | 0000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
1/2"-13 | 0.93" | 0.345" | 1 | 000000000 | 0000 | 00000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
1/2"-20 | 0.93" | 0.345" | 1 | 000000000 | 0000 | 00000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
5/8"-11 | 1.51" | 0.505" | 1 | 000000000 | 00000 | 0000000 | 000000 | 000000 | 00 | 0000000 | 000000 |
5/8"-18 | 1.51" | 0.505" | 1 | 000000000 | 00000 | 0000000 | 000000 | 000000 | 00 | 0000000 | 00000 |
3/4"-10 | 1.51" | 0.505" | 1 | 000000000 | 00000 | 0000000 | 000000 | 000000 | 00 | 0000000 | 00000 |
3/4"-16 | 1.51" | 0.505" | 1 | 000000000 | 00000 | 0000000 | 000000 | 000000 | 00 | 0000000 | 00000 |
Nuts | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread | Tri-Groove Socket Bits | Drive Handles | Open-End Wrenches | |||||||||
Size | Pitch, mm | Dia. | Ht. | Pkg. Qty. | Pkg. | Each | Each | Each | ||||
316 Stainless Steel | ||||||||||||
M5 | 0.8 | 0.66" | 0.265" | 5 | 000000000 | 000000 | 0000000 | 000000 | 0000000 | 000000 | 000000 | 00 |
M6 | 1 | 0.66" | 0.265" | 5 | 000000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
M8 | 1 | 0.82" | 0.35" | 1 | 000000000 | 0000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
M8 | 1.25 | 0.82" | 0.35" | 5 | 000000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
M10 | 1.25 | 0.82" | 0.35" | 1 | 000000000 | 0000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
M10 | 1.5 | 0.82" | 0.35" | 1 | 000000000 | 0000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
M12 | 1.5 | 0.94" | 0.35" | 1 | 000000000 | 0000 | 00000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
M12 | 1.75 | 0.94" | 0.35" | 1 | 000000000 | 0000 | 00000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
M16 | 2 | 1.51" | 0.505" | 1 | 000000000 | 00000 | 0000000 | 000000 | 000000 | 00 | 0000000 | 000000 |
Tamper-Resistant Sloped Nuts


Sloped sides make these nuts difficult to grasp with standard hand tools to reduce the risk of unwanted removal. To install, thread a second sloped nut onto the bolt upside down and insert a wrench between the two nuts to fasten. They're often used to secure signs, lighting fixtures, and displays in public spaces. A zinc yellow-chromate plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
Metric Tamper-Resistant Sloped Nuts


Difficult to grasp with standard hand tools, these nuts have sloped sides to reduce the risk of unwanted removal. To install, thread a second sloped nut onto the bolt upside down and insert a wrench between the two nuts to fasten. They're often used to secure signs, lighting fixtures, and displays in public spaces. All nuts have a finish that resists corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.