The Washer,lock, cataloged under National Stock Number 5310-01-644-6059, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Baird Supporting Systems Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-644-6059 |
| Primary Part Number | H4-0875LW |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Baird Supporting Systems Inc |
| Status | ACTIVE |
| Outside Diameter | 0.875 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5310-01-644-6059 is a Washer,lock, manufactured by Baird Supporting Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-644-6059 has 2 manufacturer part numbers on file: 36733 (Barnes Group Inc. Dba Barnes Distribution), H4-0875LW (Baird Supporting Systems Inc).
Key specifications for H4-0875LW: Outside Diameter: 0.875 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: 7/8 LOCKWASHER. 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.