The Washer,key, cataloged under National Stock Number 5310-00-274-9221, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. 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 | 5310-00-274-9221 |
| Primary Part Number | 937728PC28 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-16232,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Distance From Centerline to Inside of Prebent Key | 0.178 INCHES NOMINAL IN |
| External Prebent Key Length | 0.060 INCHES NOMINAL IN |
| Overall Distance Including Keys | 0.370 INCHES NOMINAL IN |
| Style Designator | KEY |
| Material Document and Classification | MIL-S-16788 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.320 INCHES NOMINAL IN |
| Material Thickness | 0.031 INCHES NOMINAL IN |
| Surface Treatment | PHOSPHATE OVERALL |
| External Prebent Key Width | 0.090 INCHES NOMINAL IN |
| Material | STEEL COMP C1 OVERALL |
| Hole Diameter | 0.203 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 |
| Part Number | Manufacturer |
|---|---|
| 937728PC28 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| 8Z1024PC16 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 5310-00-274-9221 is a Washer,key, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-274-9221 has 2 manufacturer part numbers on file: 937728PC28 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 8Z1024PC16 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 937728PC28: Surface Treatment Document and Classification: MIL-C-16232,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Distance From Centerline to Inside of Prebent Key: 0.178 INCHES NOMINAL IN; External Prebent Key Length: 0.060 INCHES NOMINAL IN; Overall Distance Including Keys: 0.370 INCHES NOMINAL 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.