The Washer,key, cataloged under National Stock Number 5310-00-264-0037, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-00-264-0037 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Internal Straight Key Width | 0.184 INCHES MINIMUM AND 0.184 INCHES MINIMUM AND 0.186 INCHES MAXIMUM0.186 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 1.694 INCHES NOMINAL1.694 INCHES NOMINAL IN |
| Style Designator | KEYKEY |
| Material Document and Classification | MIL-S-7952 MIL SPEC SINGLE MATERIAL RESPONSE OVERALLMIL-S-7952 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 4.125 INCHES NOMINAL4.125 INCHES NOMINAL IN |
| Material Thickness | 0.188 INCHES NOMINAL0.188 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Internal Key Quantity | 11 |
| Hole Diameter | 3.700 INCHES NOMINAL3.700 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 |
|---|---|
| 2011059 | 3/2 Design control — primary reference U.S. Government activity |
| 2011059B | 5/2 Secondary reference U.S. Government activity |
NSN 5310-00-264-0037 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-264-0037: Internal Straight Key Width: 0.184 INCHES MINIMUM AND 0.184 INCHES MINIMUM AND 0.186 INCHES MAXIMUM0.186 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 1.694 INCHES NOMINAL1.694 INCHES NOMINAL IN; Style Designator: KEYKEY; Material Document and Classification: MIL-S-7952 MIL SPEC SINGLE MATERIAL RESPONSE OVERALLMIL-S-7952 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 9 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.