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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.
Zinc alloy nuts are lightweight and corrosion resistant 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 | ||||
Zinc Alloy | ||||||||||||
| M6 | 1 | 0.66" | 0.265" | 10 | 000000000 | 00000 | 0000000 | 000000 | 0000000 | 000000 | 000000 | 00 |
| M8 | 1.25 | 0.83" | 0.345" | 10 | 000000000 | 0000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
316 Stainless Steel | ||||||||||||
| M5 | 0.8 | 0.66" | 0.265" | 5 | 000000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 | 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 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.
Aluminum nuts are lightweight, corrosion resistant in wet environments, and nonmagnetic.
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. | |
Aluminum | |||||||
|---|---|---|---|---|---|---|---|
| 10-24 | 7/16" | 3/8" | 3/16" | 40 | 10 | 000000000 | 00000 |
| 1/4"-20 | 9/16" | 31/64" | 7/32" | 70 | 10 | 000000000 | 0000 |
| 5/16"-18 | 5/8" | 1/2" | 7/32" | 150 | 10 | 000000000 | 00000 |
| 3/8"-16 | 3/4" | 19/32" | 1/4" | 195 | 10 | 000000000 | 00000 |
Zinc Alloy | |||||||
| 10-24 | 7/16" | 25/64" | 3/16" | 40 | 10 | 000000000 | 00000 |
| 1/4"-20 | 9/16" | 15/32" | 7/32" | 60 | 10 | 000000000 | 00000 |
| 5/16"-18 | 5/8" | 1/2" | 7/32" | 110 | 10 | 000000000 | 00000 |
| 3/8"-16 | 3/4" | 37/64" | 1/4" | 150 | 10 | 000000000 | 00000 |
| 1/2"-13 | 1" | 3/4" | 11/32" | 360 | 5 | 000000000 | 00000 |
| 5/8"-11 | 1 1/8" | 51/64" | 3/8" | 360 | 5 | 000000000 | 00000 |
Zinc-Plated Alloy Steel | |||||||
| 3/4"-10 | 1 1/4" | 1" | 13/32" | 1,500 | 100 | 000000000 | 000000 |
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 |
Thread | ||||||||
|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd. | Ht. | Ht. After Installation | Breaking Torque, in.-lbs. | Pkg. Qty. | Pkg. | |
Metric Zinc Alloy | ||||||||
| M6 | 1 | 14mm | 12mm | 6mm | 60 | 10 | 000000000 | 000000 |
| M8 | 1.25 | 16mm | 13mm | 6mm | 110 | 10 | 000000000 | 00000 |
| M10 | 1.5 | 19mm | 15mm | 6mm | 150 | 5 | 000000000 | 00000 |
| M12 | 1.75 | 25mm | 19mm | 9mm | 360 | 5 | 000000000 | 00000 |
Metric 18-8 Stainless Steel | ||||||||
| M6 | 1 | 10mm | 10mm | 5mm | 85 | 10 | 000000000 | 00000 |
| M8 | 1.25 | 13mm | 12mm | 7mm | 185 | 10 | 000000000 | 00000 |
| M10 | 1.5 | 17mm | 15mm | 9mm | 350 | 5 | 000000000 | 00000 |
| M12 | 1.75 | 19mm | 16mm | 9mm | 395 | 5 | 000000000 | 00000 |
Tamper-Resistant Drilled Spanner Nuts
A wide base and large bearing surface make these nuts good for securing large objects. They must be installed and removed with a spanner driver (sold separately). Use them to reduce the risk of unwanted removal for objects in public spaces such as signs, lighting fixtures, and displays. Made from zinc alloy, they're corrosion resistant in wet environments.
For technical drawings and 3-D models, click on a part number.
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.
Tamper-Resistant Serrated-Edge Locknuts
These nuts have serrations that dig into the material surface to resist loosening and are narrow to fit in tight spaces. They must be installed with a serrated-edge driver (sold separately). Use them to reduce the risk of unwanted removal for objects in public spaces such as signs, lighting fixtures, and displays. Made from aluminum, they're lightweight, corrosion resistant in wet environments, and nonmagnetic.
For technical drawings and 3-D models, click on a part number.