The Nut,plain,assembled Washer, cataloged under National Stock Number 5310-01-264-5907, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-264-5907 |
| Item Name | Nut,plain,assembled Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Washer Outside Diameter | 0.610 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN |
| Width Across Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Bearing Surface Finish | 125.0 MICROINCHES |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 450.0 FAHRENHEIT MAXIMUM DEGF |
| Material Document and Classification | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE NUT |
| Nut Counterbore Depth | 0.203 INCHES MINIMUM AND 0.223 INCHES MAXIMUM NUT IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES IN |
| Counterbore Diameter | 0.385 INCHES MINIMUM AND 0.395 INCHES MAXIMUM NUT IN |
| Nondefinitive Spec/std Data | A GRADE |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | FLAT WITH TURNED BACK EDGE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 302 OR STEEL COMP 321 WASHER |
| Material | IRON ALLOY 660 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 |
|---|---|
| 03A115-5 | 5/1 Secondary reference Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems |
| LB50-5C | 5/1 Secondary reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| 03A115-5 | 5/1 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| MS21244-5C | 2/2 Government specification standardization U.S. Government activity |
| MS21244-5C | 5/9 Secondary reference U.S. Government activity |
| 84055-5 | 5/1 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| AS381-5 | 5/1 Secondary reference U.S. Government activity |
| LB50-5C | 5/1 Secondary reference Hi-Shear Corporation |
NSN 5310-01-264-5907 is a Nut,plain,assembled Washer, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-264-5907: Overall Height: 0.436 INCHES MINIMUM AND 0.456 INCHES MAXIMUM IN; Washer Outside Diameter: 0.610 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN; Width Across Flats: 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN; Bearing Surface Finish: 125.0 MICROINCHES. 18 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.