The Washer,lock, cataloged under National Stock Number 5310-00-688-1601, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-688-1601 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Outside Diameter | 0.879 INCHES NOMINAL IN |
| Material Thickness | 0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Hole Diameter | 0.500 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 |
| Reference | Meaning |
|---|---|
| MS122036 | 5/9 Secondary reference U.S. Government activity |
| MS122036 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-688-1601 is a Washer,lock, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-688-1601: Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 0.879 INCHES NOMINAL IN; Material Thickness: 0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN; Surface Treatment: CADMIUM 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.