The Washer,key, cataloged under National Stock Number 5310-01-243-9431, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-243-9431 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Internal Straight Key Width | 0.053 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 0.163 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-35,TYPE 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Distance From Centerline to Inside of Prebent Key | 0.3075 INCHES MINIMUM AND 0.3335 INCHES MAXIMUM IN |
| External Prebent Key Length | 0.052 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 0.533 INCHES MINIMUM AND 0.559 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.505 INCHES MINIMUM AND 0.525 INCHES MAXIMUM IN |
| Material Thickness | 0.028 INCHES MINIMUM AND 0.034 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| External Prebent Key Width | 0.100 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN |
| Material | STEEL COMP 316 OVERALL |
| Hole Diameter | 0.376 INCHES MINIMUM AND 0.381 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 |
|---|---|
| 536132-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-243-9431 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-243-9431: Internal Straight Key Width: 0.053 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 0.163 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35,TYPE 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Distance From Centerline to Inside of Prebent Key: 0.3075 INCHES MINIMUM AND 0.3335 INCHES MAXIMUM IN. 14 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.