The Washer,key, cataloged under National Stock Number 5310-01-558-2231, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Bourns Inc. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-558-2231 |
| Primary Part Number | 48533 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bourns Inc |
| Status | ACTIVE |
| Surface Treatment | ZINC OVERALL |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 48533 PRIMARY | Bourns Inc (USA) |
| Reference | Meaning |
|---|---|
| 48533 | 3/9 Design control — primary reference Cat Pumps Corp |
NSN 5310-01-558-2231 is a Washer,key, manufactured by Bourns Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-558-2231 has 1 manufacturer part number on file: 48533 (Bourns Inc).
Key specifications for 48533: Surface Treatment: ZINC OVERALL; Part Name Assigned by Controlling Agency: WASHER, TAB; End Item Identification: MODEL 2530, 2531, AND 2537 PLUNGER PUMP; Material: STEEL OVERALL. 2 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.