The Washer,key, cataloged under National Stock Number 5310-01-309-8574, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 8 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-309-8574 |
| Primary Part Number | ST4M214-2 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Wire Hole Diameter | 0.046 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Distance From Centerline to Inside of Prebent Key | 0.348 INCHES NOMINAL IN |
| Material Document and Classification | QQ-A-250/5,CONDITION T3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.860 INCHES NOMINAL IN |
| Material Thickness | 0.032 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE OVERALL |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| 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 |
|---|---|
| ST4M214-2 PRIMARY | The Boeing Company Div Defense (USA) |
| ST4M214-2 | Trico Manufacturing Inc. (USA) |
| Reference | Meaning |
|---|---|
| 10122187 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| ST4M214-2 | 5/9 Secondary reference Ford Motor Company |
| ST4M214-2 | 5/9 Secondary reference Ford Motor Co Ford Parts and Service Div Government Part Sales |
NSN 5310-01-309-8574 is a Washer,key, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-309-8574 has 2 manufacturer part numbers on file: ST4M214-2 (The Boeing Company Div Defense), ST4M214-2 (Trico Manufacturing Inc.).
Key specifications for ST4M214-2: Wire Hole Diameter: 0.046 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Distance From Centerline to Inside of Prebent Key: 0.348 INCHES NOMINAL IN; Material Document and Classification: QQ-A-250/5,CONDITION T3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 8 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.