The Washer,flat, cataloged under National Stock Number 5310-00-471-2938, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Bae Systems Plc. Government technical data includes 6 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-471-2938 |
| Primary Part Number | F278162 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bae Systems Plc |
| Status | ACTIVE |
| Overall Diameter | 0.660 INCHES MINIMUM AND 0.670 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.440 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN |
| Thickness | 0.080 INCHES NOMINAL 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 |
|---|---|
| F278162 | Bae Systems Plc (GBR) |
| Reference | Meaning |
|---|---|
| 5310-99-6036750 | 6/9 Informative reference only U.S. Government activity |
| 5310-99-603 | 6/9 Informative reference only U.S. Government activity |
| F278162 | 3/9 Design control — primary reference British Aerospace (military Aircraft & Aerostructures) |
NSN 5310-00-471-2938 is a Washer,flat, manufactured by Bae Systems Plc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-471-2938 has 1 manufacturer part number on file: F278162 (Bae Systems Plc).
2 possible matches (shared part number, not a government interchangeability claim): 5310-00-471-7525, 5310-00-471-8006. Verify interchangeability with system specifications before substitution.
Key specifications for F278162: Overall Diameter: 0.660 INCHES MINIMUM AND 0.670 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Center Hole Shape Style: ROUND. 6 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.