The Washer,flat, cataloged under National Stock Number 5310-00-522-5803, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Consumers' Aircraft Company Inc. Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-522-5803 |
| Primary Part Number | 042663 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Consumers' Aircraft Company Inc |
| Status | ACTIVE |
| Overall Diameter | 0.438 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | ZINC OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.196 INCHES NOMINAL IN |
| Thickness | 0.031 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 |
|---|---|
| 042663 PRIMARY | Consumers' Aircraft Company Inc (USA) |
| Reference | Meaning |
|---|---|
| 042663 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| 042663 | 5/9 Secondary reference General Motors Corp |
NSN 5310-00-522-5803 is a Washer,flat, manufactured by Consumers' Aircraft Company Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-522-5803 has 1 manufacturer part number on file: 042663 (Consumers' Aircraft Company Inc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-119-3771. Verify interchangeability with system specifications before substitution.
Key specifications for 042663: Overall Diameter: 0.438 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: ZINC OVERALL; Peripheral Shape Style: ROUND. 8 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.