The Washer,flat, cataloged under National Stock Number 5310-01-648-2302, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The American Society of Mechanical Engineers. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-648-2302 |
| Primary Part Number | W221NAAN062H436BNJA1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | ACTIVE |
| Overall Diameter | 1.315 INCHES MINIMUM AND 1.342 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | BLANK RECTANGULAR |
| Surface Treatment | CHROMIUM AND ZINC OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.649 INCHES MINIMUM AND 0.686 INCHES MAXIMUM IN |
| Thickness | 0.021 INCHES MINIMUM AND 0.216 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 |
|---|---|
| W221NAAN062H436BNJA1 PRIMARY | The American Society of Mechanical Engineers (USA) |
| Reference | Meaning |
|---|---|
| ASME B18.22.1 | 5/1 Secondary reference The American Society of Mechanical Engineers |
NSN 5310-01-648-2302 is a Washer,flat, manufactured by The American Society of Mechanical Engineers, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-648-2302 has 1 manufacturer part number on file: W221NAAN062H436BNJA1 (The American Society of Mechanical Engineers).
2 possible matches (shared part number, not a government interchangeability claim): 5310-01-674-5062, 5310-01-674-5065. Verify interchangeability with system specifications before substitution.
Key specifications for W221NAAN062H436BNJA1: Overall Diameter: 1.315 INCHES MINIMUM AND 1.342 INCHES MAXIMUM IN; Cross-Sectional Shape Style: BLANK RECTANGULAR; Surface Treatment: CHROMIUM AND 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.