The Washer,lock, cataloged under National Stock Number 5310-01-526-8023, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-526-8023 |
| Primary Part Number | 126745 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bourns Inc |
| Status | ACTIVE |
| Style Designator | COUNTERSINK EXTERNAL TEETH |
| Material | STEEL AND ZINC 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 |
|---|---|
| 126745 PRIMARY | Bourns Inc (USA) |
| Reference | Meaning |
|---|---|
| 210619 | 5/9 Secondary reference Cat Pumps Corp |
| 126745 | 5/9 Secondary reference Cat Pumps Corp |
NSN 5310-01-526-8023 is a Washer,lock, manufactured by Bourns Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-526-8023 has 1 manufacturer part number on file: 126745 (Bourns Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-693-3512, 4320-01-693-3539. Verify interchangeability with system specifications before substitution.
Key specifications for 126745: Style Designator: COUNTERSINK EXTERNAL TEETH; Part Name Assigned by Controlling Agency: LOCKWASHER,CONICAL (M6); End Item Identification: NSN 4610-01-495-0046;WATER PURIFICATION EQUIPMENT SET; Material: STEEL AND ZINC 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.