The Nut,plain,extended Washer,double, cataloged under National Stock Number 5310-00-950-2601, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 13 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-950-2601 |
| Primary Part Number | 79325-428 |
| Item Name | Nut,plain,extended Washer,double |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Washer Outside Diameter | 0.460 INCHES MINIMUM AND 0.480 INCHES MAXIMUM IN |
| Width Across Flats | 0.298 INCHES MINIMUM AND 0.318 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNF |
| Washer Thickness | 0.015 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 8740 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 79325-428 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 369A1603 | 5/9 Secondary reference The Boeing Company |
| 369A1603 | 5/9 Secondary reference Mcdonnell Douglas Helicopter Co Inc |
| VCU0001 | 5/9 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| 79325-428 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation |
NSN 5310-00-950-2601 is a Nut,plain,extended Washer,double, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-950-2601 has 1 manufacturer part number on file: 79325-428 (Northrop Grumman Systems Corporation).
Key specifications for 79325-428: Overall Height: 0.335 INCHES MINIMUM AND 0.355 INCHES MAXIMUM IN; Washer Outside Diameter: 0.460 INCHES MINIMUM AND 0.480 INCHES MAXIMUM IN; Width Across Flats: 0.298 INCHES MINIMUM AND 0.318 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 13 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.