The Washer,lock, cataloged under National Stock Number 5310-01-686-1838, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Fastenal Company. Government technical data includes 5 specifications, 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 | 5310-01-686-1838 |
| Primary Part Number | 78113 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Fastenal Company |
| Status | ACTIVE |
| Style Designator | FLAT INTERNAL TEETH |
| Outside Diameter | 0.478 INCHES NOMINAL IN |
| Material Thickness | 0.023 INCHES NOMINAL IN |
| Material | STEEL COMP 316 OVERALL |
| Hole Diameter | 0.257 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 5310-01-686-1838 is a Washer,lock, manufactured by Fastenal Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-686-1838 has 2 manufacturer part numbers on file: 78113 (Fastenal Company), FS-01010 (Hdt Expeditionary Systems Inc).
Key specifications for 78113: Style Designator: FLAT INTERNAL TEETH; Outside Diameter: 0.478 INCHES NOMINAL IN; Material Thickness: 0.023 INCHES NOMINAL IN; End Item Identification: 4120-01-671-6270. 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.