The Washer,flat, cataloged under National Stock Number 5310-00-262-4770, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Ambac International Corporation Div Ambac International. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-262-4770 |
| Primary Part Number | WA402815 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ambac International Corporation Div Ambac International |
| Status | ACTIVE |
| Overall Diameter | 13.9 MILLIMETERS MINIMUM AND 14.0 MILLIMETERS MAXIMUM MM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Thickness | 0.020 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 |
|---|---|
| WA402815 PRIMARY | Ambac International Corporation Div Ambac International (USA) |
| Reference | Meaning |
|---|---|
| WMS2157-3X | 5/9 Secondary reference Ambac International Corporation Div Ambac International |
| R-3580 | C/1 Advisory reference — outside the item-of-supply concept Bauer Compressors, Inc. |
NSN 5310-00-262-4770 is a Washer,flat, manufactured by Ambac International Corporation Div Ambac International, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-262-4770 has 1 manufacturer part number on file: WA402815 (Ambac International Corporation Div Ambac International).
1 possible match (shared part number, not a government interchangeability claim): 6210-01-070-7584. Verify interchangeability with system specifications before substitution.
Key specifications for WA402815: Overall Diameter: 13.9 MILLIMETERS MINIMUM AND 14.0 MILLIMETERS MAXIMUM MM; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Material: STEEL OVERALL. 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.