The Washer,lock, cataloged under National Stock Number 5310-01-055-7780, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is General Electric Co Direct Current Motor and Generator Dept. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-055-7780 |
| Primary Part Number | 124A9375AA104 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | General Electric Co Direct Current Motor and Generator Dept |
| Status | ACTIVE |
| Hardness Rating | 45.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM53.0 ROCKWELL C MAXIMUM |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Outside Diameter | 0.493 INCHES MAXIMUM0.493 INCHES MAXIMUM IN |
| Material Thickness | 0.062 INCHES MINIMUM AND 0.062 INCHES MINIMUM AND 0.072 INCHES MAXIMUM0.072 INCHES MAXIMUM IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.255 INCHES MINIMUM AND 0.255 INCHES MINIMUM AND 0.267 INCHES MAXIMUM0.267 INCHES MAXIMUM 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 |
|---|---|
| N405P41 | General Electric Co Direct Current Motor and Generator Dept (USA) |
| 124A9375AA104 PRIMARY | General Electric Co Direct Current Motor and Generator Dept (USA) |
| Reference | Meaning |
|---|---|
| DOD-P- TYZ CL2 | 5/1 Secondary reference U.S. Government activity |
NSN 5310-01-055-7780 is a Washer,lock, manufactured by General Electric Co Direct Current Motor and Generator Dept, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-055-7780 has 2 manufacturer part numbers on file: N405P41 (General Electric Co Direct Current Motor and Generator Dept), 124A9375AA104 (General Electric Co Direct Current Motor and Generator Dept).
Key specifications for 124A9375AA104: Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM53.0 ROCKWELL C MAXIMUM; Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 0.493 INCHES MAXIMUM0.493 INCHES MAXIMUM IN; Material Thickness: 0.062 INCHES MINIMUM AND 0.062 INCHES MINIMUM AND 0.072 INCHES MAXIMUM0.072 INCHES MAXIMUM IN. 7 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.