The Washer,lock, cataloged under National Stock Number 5310-01-669-0895, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Hansome Energy Systems Inc. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-669-0895 |
| Primary Part Number | A-445-111PC99 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Hansome Energy Systems Inc |
| Status | ACTIVE |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Surface Treatment | ZINC OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.250 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 |
| Part Number | Manufacturer |
|---|---|
| A-445-111PC99 PRIMARY | Hansome Energy Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| A-445-111 | D/9 Drawing number reference only Hansome Energy Systems Inc |
NSN 5310-01-669-0895 is a Washer,lock, manufactured by Hansome Energy Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-669-0895 has 1 manufacturer part number on file: A-445-111PC99 (Hansome Energy Systems Inc).
2 possible matches (shared part number, not a government interchangeability claim): 5310-01-669-0898, 5305-01-669-0907. Verify interchangeability with system specifications before substitution.
Key specifications for A-445-111PC99: Style Designator: SPLIT HELICAL-RIGHT HAND; Surface Treatment: ZINC OVERALL; Part Name Assigned by Controlling Agency: POSITIVE SPLIT RING LOCKWASHER; End Item Identification: A.C. MOTOR. 4 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.