The Washer,lock, cataloged under National Stock Number 5310-00-931-2222, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Hartford Compressors Inc. Government technical data includes 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-931-2222 |
| Primary Part Number | WAS103T6 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Hartford Compressors Inc |
| Status | ACTIVE |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Outside Diameter | 0.663 INCHES NOMINAL IN |
| Material Thickness | 0.107 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Hole Diameter | 0.385 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 |
|---|---|
| WAS103T6 PRIMARY | Hartford Compressors Inc (USA) |
| Reference | Meaning |
|---|---|
| 012P01 | 5/9 Secondary reference Hartford Compressors Inc |
| 01201 | 5/9 Secondary reference Hartford Compressors Inc |
NSN 5310-00-931-2222 is a Washer,lock, manufactured by Hartford Compressors Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-931-2222 has 1 manufacturer part number on file: WAS103T6 (Hartford Compressors Inc).
3 possible matches (shared part number, not a government interchangeability claim): 3990-01-360-9669, 5310-01-716-0890, 5330-01-719-6742. Verify interchangeability with system specifications before substitution.
Key specifications for WAS103T6: Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 0.663 INCHES NOMINAL IN; Material Thickness: 0.107 INCHES NOMINAL IN; Material: STEEL OVERALL. 5 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.