The Washer,flat, cataloged under National Stock Number 5310-01-050-1307, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-050-1307 |
| Primary Part Number | WA2001 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ambac International Corporation Div Ambac International |
| Status | ACTIVE |
| Overall Diameter | 0.435 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CADMIUM OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.203 INCHES NOMINAL IN |
| Thickness | 0.052 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 |
|---|---|
| WA2001 PRIMARY | Ambac International Corporation Div Ambac International (USA) |
| Reference | Meaning |
|---|---|
| 147-0278 | 5/9 Secondary reference Cummins Power Generation Inc. |
NSN 5310-01-050-1307 is a Washer,flat, manufactured by Ambac International Corporation Div Ambac International, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-050-1307 has 1 manufacturer part number on file: WA2001 (Ambac International Corporation Div Ambac International).
Key specifications for WA2001: Overall Diameter: 0.435 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: CADMIUM 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.