The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-337-7030, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-337-7030 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Washer Outside Diameter | 1.556 INCHES NOMINAL IN |
| Width Across Flats | 1.364 INCHES MINIMUM AND 1.377 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT |
| Surface Treatment Document and Classification | MIL-C-83286 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT THREADS |
| Thread Series | UNJS |
| Temp Rating | 250.0 FAHRENHEIT MAXIMUM DEGF |
| Hardness Rating | 29.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM |
| Washer Thickness | 0.438 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.125 INCHES IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL EXCEPT INSERT |
| Surface Treatment | PAINT OVERALL EXCEPT THREADS |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 3B |
| Test Data Document | 96906-MIL-STD-1949 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.). |
| Thread Quantity Per Inch | 12 |
| Material | PLASTIC NYLON LOCKING INSERT |
| Material | STEEL COMP 4130 OR STEEL COMP 4340 OR STEEL COMP 8630 NUT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 9032703-03 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-337-7030 is a Nut,self-Locking,extended Washer, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-337-7030: Overall Height: 1.265 INCHES MINIMUM AND 1.327 INCHES MAXIMUM IN; Washer Outside Diameter: 1.556 INCHES NOMINAL IN; Width Across Flats: 1.364 INCHES MINIMUM AND 1.377 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT. 19 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.