The Washer,key, cataloged under National Stock Number 5310-01-087-4313, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-087-4313 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES ALL SURFACES |
| Internal Straight Key Width | 0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 0.342 INCHES MINIMUM AND 0.347 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-P-16232,TYPE Z,CL 4A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL A |
| Overall Distance Including Keys | 1.230 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM |
| Style Designator | KEY |
| Material Document and Classification | AMS6350 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.030 INCHES MINIMUM AND 1.050 INCHES MAXIMUM IN |
| Material Thickness | 0.046 INCHES MINIMUM AND 0.054 INCHES MAXIMUM IN |
| External Straight Key Width | 0.080 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN |
| External Key Quantity | 3 |
| Surface Treatment | PHOSPHATE OVERALL |
| Material | STEEL OVERALL |
| Internal Key Quantity | 2 |
| Hole Diameter | 0.830 INCHES MINIMUM AND 0.850 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 |
|---|---|
| 4045T78P01 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-087-4313 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-087-4313: Surface Finish: 63.0 MICROINCHES ALL SURFACES; Internal Straight Key Width: 0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 0.342 INCHES MINIMUM AND 0.347 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-P-16232,TYPE Z,CL 4A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL A. 16 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.