The Washer,lock, cataloged under National Stock Number 5310-01-661-3880, 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. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-661-3880 |
| Primary Part Number | 33564 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Industrial Technologies and Services Llc |
| Status | ACTIVE |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| 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 |
|---|---|
| 33564 PRIMARY | Industrial Technologies and Services Llc (USA) |
| Reference | Meaning |
|---|---|
| 4236549 | 7/2 Vendor item drawing reference Oshkosh Defense Llc |
NSN 5310-01-661-3880 is a Washer,lock, manufactured by Industrial Technologies and Services Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-661-3880 has 1 manufacturer part number on file: 33564 (Industrial Technologies and Services Llc).
Key specifications for 33564: Style Designator: SPLIT HELICAL-RIGHT HAND; Part Name Assigned by Controlling Agency: WASHER, LOCK DELUGE PUMP; End Item Identification: 4210-01-622-0440; TRUCK, FIRE FIGHTING. 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.