The Washer,lock, cataloged under National Stock Number 5310-01-564-3305, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Fastenal Company Dba Fastenal Co. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-564-3305 |
| Primary Part Number | 40379 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Fastenal Company Dba Fastenal Co |
| Status | ACTIVE |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Outside Diameter | 7.6 MILLIMETERS NOMINAL MM |
| Material Thickness | 0.8 MILLIMETERS MINIMUM AND 1.0 MILLIMETERS MAXIMUM MM |
| Material | STEEL OVERALL |
| Hole Diameter | 4.2 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| 40379 PRIMARY | Fastenal Company Dba Fastenal Co (USA) |
NSN 5310-01-564-3305 is a Washer,lock, manufactured by Fastenal Company Dba Fastenal Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-564-3305 has 1 manufacturer part number on file: 40379 (Fastenal Company Dba Fastenal Co).
Key specifications for 40379: Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 7.6 MILLIMETERS NOMINAL MM; Material Thickness: 0.8 MILLIMETERS MINIMUM AND 1.0 MILLIMETERS MAXIMUM MM; Special Features: M4 DIN 127 ZINC PLATED SPLIT LOCK WASHER. 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.