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Locknuts for Metal Conduit Fittings
Zinc-Plated Steel,
316 Stainless
Steel, and Aluminum
316 Stainless
Steel, and Aluminum
Zinc-Plated Steel with PVC Molded Gasket
Zinc-Plated
Steel with
Serrated Facing
Steel with
Serrated Facing
304 Stainless Steel
Brass
Secure threaded metal conduit fittings to a knockout in an outlet box or enclosure.
Zinc-plated steel, 316 stainless steel, and aluminum locknuts are compatible with NPSL and NPSM threads.
Locknuts with a PVC molded gasket create a seal for moisture protection.
Locknuts with serrated facing grip the material surface for more stability, compared to locknuts with smooth facing.
For technical drawings and 3-D models, click on a part number.
Pipe Size | Thread Size | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||
|---|---|---|---|---|---|
NPSM Threads | |||||
| 1/2 | __ | UL Listed, CSA Certified | 10 | 00000000 | 00000 |
| 3/4 | __ | UL Listed, CSA Certified | 10 | 00000000 | 0000 |
| 1 | __ | UL Listed, CSA Certified | 10 | 00000000 | 0000 |
| 1 1/2 | __ | UL Listed, CSA Certified | 10 | 00000000 | 00000 |
| 1 1/4 | __ | UL Listed, CSA Certified | 10 | 00000000 | 0000 |
| 2 | __ | UL Listed, CSA Certified | 10 | 00000000 | 00000 |
| Each | |||||
| 2 1/2 | __ | CSA Certified | __ | 00000000 | 0000 |
| 3 | __ | CSA Certified | __ | 00000000 | 0000 |
| 3 1/2 | __ | CSA Certified | __ | 00000000 | 0000 |
| 4 | __ | CSA Certified | __ | 00000000 | 0000 |
| Pkg. | |||||
Zinc-Plated Steel with PVC Molded Gasket | |||||
NPSM Threads | |||||
| 1/2 | __ | UL Listed, CSA Certified | 2 | 00000000 | 0000 |
| 3/4 | __ | UL Listed, CSA Certified | 2 | 00000000 | 0000 |
| 1 | __ | UL Listed, CSA Certified | 2 | 00000000 | 0000 |
| 1 1/2 | __ | UL Listed, CSA Certified | 2 | 00000000 | 0000 |
| 1 1/4 | __ | UL Listed, CSA Certified | 2 | 00000000 | 0000 |
| 2 | __ | UL Listed, CSA Certified | 2 | 00000000 | 00000 |
| Each | |||||
| 2 1/2 | __ | CSA Certified | __ | 00000000 | 00000 |
| 3 | __ | CSA Certified | __ | 00000000 | 00000 |
| 3 1/2 | __ | CSA Certified | __ | 00000000 | 00000 |
| 4 | __ | CSA Certified | __ | 00000000 | 00000 |
Zinc-Plated Steel with Serrated Facing | |||||
NPSM Threads | |||||
| 1/2 | __ | UL Listed, CSA Certified | __ | 00000000 | 0000 |
| 3/4 | __ | UL Listed, CSA Certified | __ | 00000000 | 0000 |
| 1 | __ | UL Listed, CSA Certified | __ | 00000000 | 0000 |
| 1 1/2 | __ | UL Listed, CSA Certified | __ | 00000000 | 0000 |
| 1 1/4 | __ | UL Listed, CSA Certified | __ | 00000000 | 0000 |
| 2 | __ | UL Listed, CSA Certified | __ | 00000000 | 0000 |
| 2 1/2 | __ | CSA Certified | __ | 00000000 | 00000 |
| 3 | __ | CSA Certified | __ | 00000000 | 00000 |
| 4 | __ | CSA Certified | __ | 00000000 | 00000 |
304 Stainless Steel | |||||
PG Threads | |||||
| __ | PG-7 | __ | __ | 00000000 | 0000 |
| __ | PG-9 | __ | __ | 00000000 | 0000 |
| __ | PG-11 | __ | __ | 00000000 | 0000 |
| __ | PG-13.5 | __ | __ | 00000000 | 0000 |
| __ | PG-16 | __ | __ | 00000000 | 0000 |
| __ | PG-21 | __ | __ | 00000000 | 00000 |
| __ | PG-29 | __ | __ | 00000000 | 00000 |
| __ | PG-36 | __ | __ | 00000000 | 00000 |
Metric Threads | |||||
| __ | M8 | __ | __ | 00000000 | 0000 |
| __ | M12 | __ | __ | 00000000 | 0000 |
| __ | M16 | __ | __ | 00000000 | 0000 |
| __ | M20 | __ | __ | 00000000 | 0000 |
| __ | M25 | __ | __ | 00000000 | 0000 |
| __ | M32 | __ | __ | 00000000 | 00000 |
| __ | M40 | __ | __ | 00000000 | 00000 |
| __ | M50 | __ | __ | 00000000 | 00000 |
| __ | M63 | __ | __ | 00000000 | 00000 |
316 Stainless Steel | |||||
NPSL | |||||
| 1/2 | __ | UL Listed, C-UL Listed | __ | 00000000 | 00000 |
| 3/4 | __ | UL Listed, C-UL Listed | __ | 00000000 | 00000 |
| 1 | __ | UL Listed, C-UL Listed | __ | 00000000 | 00000 |
| 1 1/2 | __ | UL Listed, C-UL Listed | __ | 00000000 | 00000 |
| 1 1/4 | __ | UL Listed, C-UL Listed | __ | 00000000 | 00000 |
| 2 | __ | UL Listed, C-UL Listed | __ | 00000000 | 00000 |
| 3 | __ | UL Listed, C-UL Listed | __ | 00000000 | 00000 |
| 4 | __ | UL Listed, C-UL Listed | __ | 00000000 | 00000 |
Aluminum | |||||
NPSM Threads | |||||
| 1/2 | __ | __ | __ | 00000000 | 0000 |
| 3/4 | __ | __ | __ | 00000000 | 0000 |
| 1 | __ | __ | __ | 00000000 | 0000 |
| 1 1/2 | __ | __ | __ | 00000000 | 0000 |
| 1 1/4 | __ | __ | __ | 00000000 | 0000 |
| 2 | __ | __ | __ | 00000000 | 00000 |
Brass | |||||
Metric Threads | |||||
| __ | M12 | DIN EN 60204 | __ | 0000000 | 0000 |
| __ | M16 | DIN EN 60204 | __ | 0000000 | 0000 |
| __ | M20 | DIN EN 60204 | __ | 0000000 | 0000 |
| __ | M25 | DIN EN 60204 | __ | 00000000 | 0000 |
| __ | M32 | DIN EN 60204 | __ | 0000000 | 0000 |
| __ | M40 | DIN EN 60204 | __ | 0000000 | 00000 |
| __ | M50 | DIN EN 60204 | __ | 0000000 | 00000 |
| __ | M63 | DIN EN 60204 | __ | 00000000 | 00000 |
Locknuts for Plastic Conduit Fittings
Nylon
PVC
Secure threaded plastic conduit fittings to a knockout in an outlet box or enclosure. PVC locknuts are compatible with PVC Schedule 40 and Schedule 80 conduit with NPT and NPSM threads.
For technical drawings and 3-D models, click on a part number.
Black | Gray | |||||
|---|---|---|---|---|---|---|
| Thread Size | Pipe Size | Specifications Met | Each | Each | ||
Nylon | ||||||
NPT Threads | ||||||
| __ | 1/4 | __ | 00000000 | 00000 | 00000000 | 00000 |
| __ | 3/8 | __ | 00000000 | 000 | 00000000 | 000 |
| __ | 1/2 | __ | 00000000 | 000 | 00000000 | 0000 |
| __ | 3/4 | __ | 00000000 | 0000 | 00000000 | 0000 |
| __ | 1 | __ | 00000000 | 0000 | 00000000 | 0000 |
| __ | 1 1/2 | __ | 00000000 | 0000 | 00000000 | 0000 |
| __ | 1 1/4 | __ | 00000000 | 0000 | 00000000 | 0000 |
| __ | 2 | __ | 00000000 | 00000 | 00000000 | 00000 |
PG Threads | ||||||
| PG-7 | __ | __ | 0000000 | 000 | 00000000 | 000 |
| PG-9 | __ | __ | 00000000 | 0000 | 00000000 | 0000 |
| PG-11 | __ | __ | 0000000 | 0000 | 00000000 | 0000 |
| PG-13.5 | __ | __ | 0000000 | 0000 | 0000000 | 0000 |
| PG-16 | __ | __ | 0000000 | 0000 | 00000000 | 0000 |
| PG-21 | __ | __ | 0000000 | 0000 | 00000000 | 0000 |
| PG-29 | __ | __ | 0000000 | 0000 | 00000000 | 0000 |
| PG-36 | __ | __ | 0000000 | 00000 | 00000000 | 00000 |
| PG-48 | __ | __ | 00000000 | 00000 | 000000 | 00 |
Metric Threads | ||||||
| M12 | __ | __ | 00000000 | 0000 | 00000000 | 0000 |
| M16 | __ | __ | 00000000 | 0000 | 00000000 | 0000 |
| M20 | __ | __ | 0000000 | 0000 | 00000000 | 0000 |
| M25 | __ | __ | 00000000 | 0000 | 00000000 | 0000 |
| M32 | __ | __ | 00000000 | 0000 | 00000000 | 0000 |
| M40 | __ | __ | 00000000 | 0000 | 00000000 | 0000 |
| M50 | __ | __ | 00000000 | 00000 | 000000 | 00 |
| M63 | __ | __ | 00000000 | 00000 | 00000000 | 00000 |
PVC | ||||||
NPSM Threads | ||||||
| __ | 1/2 | UL Recognized Component | 000000 | 00 | 0000000 | 000 |
| __ | 3/4 | UL Recognized Component | 000000 | 00 | 0000000 | 0000 |
| __ | 1 | UL Recognized Component | 000000 | 00 | 0000000 | 0000 |