The Nut,self-Locking,internal Wrench, cataloged under National Stock Number 5310-00-488-8982, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Esna, Llc. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-488-8982 |
| Primary Part Number | 12NB182 |
| Item Name | Nut,self-Locking,internal Wrench |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT |
| Thread Series | UNF |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.125 INCHES IN |
| Nut Diameter | 1.875 INCHES NOMINAL IN |
| Width Between Flats | 1.315 INCHES MINIMUM AND 1.327 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 2.141 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL EXCEPT INSERT |
| Internal Drive Style | DOUBLE HEXAGON |
| Nut Style | INTERNAL WRENCHING |
| Thread Class | 3B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL OVERALL EXCEPT INSERT |
| Material | PLASTIC POLYAMIDE NYLON LOCKING INSERT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 12NB182 PRIMARY | Esna, Llc (USA) |
| Reference | Meaning |
|---|---|
| 12NB182 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-00-488-8982 is a Nut,self-Locking,internal Wrench, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-488-8982 has 1 manufacturer part number on file: 12NB182 (Esna, Llc).
Key specifications for 12NB182: Surface Treatment Document and Classification: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT; Thread Series: UNF; Hardness Rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM; Thread Direction: RIGHT-HAND. 16 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.