The Washer,flat, cataloged under National Stock Number 5310-01-586-0557, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Cummins Power Generation Inc.. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-586-0557 |
| Primary Part Number | 04-20749-2 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Cummins Power Generation Inc. |
| Status | ACTIVE |
| Hole Diameter | 12.5 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| 04-20749-2 PRIMARY | Cummins Power Generation Inc. (USA) |
| A026L575 | Cummins Power Generation Inc. (USA) |
| 04-20749-2 PRIMARY | Department of Defense Project Manager-Mobile Electric Power (USA) |
| Reference | Meaning |
|---|---|
| 04-20655 | D/9 Drawing number reference only Cummins Power Generation Inc. |
| 04-20657 | D/9 Drawing number reference only Department of Defense Project Manager-Mobile Electric Power |
NSN 5310-01-586-0557 is a Washer,flat, manufactured by Cummins Power Generation Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-586-0557 has 3 manufacturer part numbers on file: 04-20749-2 (Cummins Power Generation Inc.), A026L575 (Cummins Power Generation Inc.), 04-20749-2 (Department of Defense Project Manager-Mobile Electric Power).
1 possible match (shared part number, not a government interchangeability claim): 5306-01-591-6658. Verify interchangeability with system specifications before substitution.
Key specifications for 04-20749-2: Part Name Assigned by Controlling Agency: WASHER (SNUBBING,HARDENED,12.5MM ID) MM; End Item Identification: 6115-01-561-7329 GENERATOR SET,DIESEL ENGINE,5.0 KW; Hole Diameter: 12.5 MILLIMETERS NOMINAL MM. 1 specification is 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.