The Washer,key, cataloged under National Stock Number 5310-00-137-6522, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-137-6522 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALLMIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Distance From Centerline to Inside of Prebent Key | 0.146 INCHES NOMINAL0.146 INCHES NOMINAL IN |
| External Prebent Key Length | 0.078 INCHES NOMINAL0.078 INCHES NOMINAL IN |
| Overall Distance Including Keys | 0.432 INCHES NOMINAL0.432 INCHES NOMINAL IN |
| Material Document and Classification | QQ-A-250/8 H34 FED SPEC SINGLE MATERIAL RESPONSE OVERALLQQ-A-250/8 H34 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.287 INCHES NOMINAL0.287 INCHES NOMINAL IN |
| Material Thickness | 0.020 INCHES NOMINAL0.020 INCHES NOMINAL IN |
| External Straight Key Width | 0.090 INCHES NOMINAL0.090 INCHES NOMINAL IN |
| External Key Quantity | 88 |
| Surface Treatment | CHROMATE OVERALLCHROMATE OVERALL |
| External Prebent Key Width | 0.093 INCHES NOMINAL0.093 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 5052 OVERALL |
| Hole Diameter | 0.050 INCHES NOMINAL0.050 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 |
| Reference | Meaning |
|---|---|
| MS17186-1 | 2/2 Government specification standardization U.S. Government activity |
NSN 5310-00-137-6522 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-137-6522: Surface Treatment Document and Classification: MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALLMIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Distance From Centerline to Inside of Prebent Key: 0.146 INCHES NOMINAL0.146 INCHES NOMINAL IN; External Prebent Key Length: 0.078 INCHES NOMINAL0.078 INCHES NOMINAL IN; Overall Distance Including Keys: 0.432 INCHES NOMINAL0.432 INCHES NOMINAL IN. 13 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.