The Washer,flat, cataloged under National Stock Number 5310-01-478-3454, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rms. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-478-3454 |
| Primary Part Number | 7260732-P1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Overall Diameter | 0.495 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 316 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 7260732-P1 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| 7260732-P1 | Thales Uk Limited Dba Thales Uk Ltd Underwater Systems (GBR) |
| 7260732-P1 | Arnold Wragg Limited (GBR) |
NSN 5310-01-478-3454 is a Washer,flat, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-478-3454 has 3 manufacturer part numbers on file: 7260732-P1 (Lockheed Martin Corporation Div Rms), 7260732-P1 (Thales Uk Limited Dba Thales Uk Ltd Underwater Systems), 7260732-P1 (Arnold Wragg Limited).
Key specifications for 7260732-P1: Overall Diameter: 0.495 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN; Special Features: THICKNESS, 0.050 IN PORM .005; FINISH, PASSIVATE, QQ-P-35 IN; Peripheral Shape Style: ROUND; Material: STEEL COMP 316 OVERALL. 5 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.