The Washer,key, cataloged under National Stock Number 5310-01-128-4114, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-128-4114 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES ALL SURFACES |
| Overall Distance Including Keys | 3.020 INCHES MINIMUM AND 3.060 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 2.860 INCHES MINIMUM AND 2.870 INCHES MAXIMUM IN |
| Material Thickness | 0.045 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN |
| External Straight Key Width | 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| External Key Quantity | 4 |
| External Prebent Key Width | 0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN |
| Hole Diameter | 2.650 INCHES MINIMUM AND 2.660 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 |
| Reference | Meaning |
|---|---|
| 10109479 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 4056T47G01 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-128-4114 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-128-4114: Surface Finish: 63.0 MICROINCHES ALL SURFACES; Overall Distance Including Keys: 3.020 INCHES MINIMUM AND 3.060 INCHES MAXIMUM IN; Material Document and Classification: AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 2.860 INCHES MINIMUM AND 2.870 INCHES MAXIMUM IN. 9 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.