The Washer,key, cataloged under National Stock Number 5310-01-127-3780, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-127-3780 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES ALL SURFACES |
| Internal Straight Key Width | 0.230 INCHES MINIMUM AND 0.240 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 1.540 INCHES MINIMUM AND 1.560 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 3.966 INCHES MINIMUM AND 3.974 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Material Document and Classification | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 3.700 INCHES MINIMUM AND 3.720 INCHES MAXIMUM IN |
| Material Thickness | 0.045 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN |
| External Straight Key Width | 0.280 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN |
| External Key Quantity | 3 |
| Internal Key Quantity | 4 |
| Hole Diameter | 3.360 INCHES MINIMUM AND 3.380 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 |
|---|---|
| 10109459 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 3027T86P01 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-127-3780 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-127-3780: Surface Finish: 63.0 MICROINCHES ALL SURFACES; Internal Straight Key Width: 0.230 INCHES MINIMUM AND 0.240 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 1.540 INCHES MINIMUM AND 1.560 INCHES MAXIMUM IN; Overall Distance Including Keys: 3.966 INCHES MINIMUM AND 3.974 INCHES MAXIMUM IN. 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.