The Washer,lock, cataloged under National Stock Number 5310-01-089-0538, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Industrial Technologies and Services Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Washer,lock |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Industrial Technologies and Services Llc (CAGE 76122) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-089-0538 |
| Primary Part Number | 21266 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Industrial Technologies and Services Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 21266 PRIMARY | Industrial Technologies and Services Llc (USA) |
| Reference | Meaning |
|---|---|
| 21266 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5310-01-089-0538 is a Washer,lock, manufactured by Industrial Technologies and Services Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-089-0538 has 1 manufacturer part number on file: 21266 (Industrial Technologies and Services Llc).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-264-9289, 5998-01-338-1601, 6520-01-591-3811. Verify interchangeability with system specifications before substitution.
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.