The Washer,key, cataloged under National Stock Number 5310-01-543-8596, 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13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-543-8596 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Internal Prebent Key Width | 0.160 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 5.930 INCHES MINIMUM AND 5.950 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Material Document and Classification | QQ-S-766 COND A (ANNEALED) FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 5.555 INCHES MINIMUM AND 5.575 INCHES MAXIMUM IN |
| Material Thickness | 0.050 INCHES NOMINAL IN |
| External Straight Key Width | 0.220 INCHES MINIMUM AND 0.240 INCHES MAXIMUM IN |
| External Key Quantity | 12 |
| Internal Prebent Key Length | 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 302 OR STEEL COMP 304 OVERALL |
| Hole Diameter | 5.130 INCHES MINIMUM AND 5.140 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 |
|---|---|
| BSSR-54003-3 | 3/2 Design control — primary reference U.S. Government activity |
| 4D0196-3 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-543-8596 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-543-8596: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Internal Prebent Key Width: 0.160 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN; Overall Distance Including Keys: 5.930 INCHES MINIMUM AND 5.950 INCHES MAXIMUM IN; Style Designator: KEY. 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.