The Washer,key, cataloged under National Stock Number 5310-00-348-3509, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is General Electric Company. Government technical data includes 12 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 | 5310-00-348-3509 |
| Primary Part Number | 612A121P1 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | General Electric Company |
| Status | ACTIVE |
| Surface Treatment Document and Classification | AMS 2640 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Overall Distance Including Keys | 1.000 INCHES MINIMUM AND 1.040 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Material Document and Classification | AMS 5040 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5042 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.500 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN |
| Material Thickness | 0.026 INCHES MINIMUM AND 0.034 INCHES MAXIMUM IN |
| External Straight Key Width | 0.220 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| External Key Quantity | 2 |
| Color | BLACK OVERALL |
| Surface Treatment | OXIDE FILM OVERALL |
| Material | STEEL COMP 1010 OVERALL |
| Hole Diameter | 0.281 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 5310-00-348-3509 is a Washer,key, manufactured by General Electric Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-348-3509 has 2 manufacturer part numbers on file: 612A121P1 (General Electric Company), 612A121P1 (General Electric Company).
Key specifications for 612A121P1: Surface Treatment Document and Classification: AMS 2640 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Overall Distance Including Keys: 1.000 INCHES MINIMUM AND 1.040 INCHES MAXIMUM IN; Style Designator: KEY; Material Document and Classification: AMS 5040 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5042 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 12 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.