The Washer,key, cataloged under National Stock Number 5310-01-106-3263, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-106-3263 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Overall Distance Including Keys | 90.0 MILLIMETERS MINIMUM AND 90.5 MILLIMETERS MAXIMUM MM |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| Style Designator | KEY |
| Material Document and Classification | MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 81.480 MILLIMETERS MINIMUM AND 82.250 MILLIMETERS MAXIMUM MM |
| Material Thickness | 3.0 MILLIMETERS NOMINAL MM |
| External Straight Key Width | 25.0 MILLIMETERS NOMINAL MM |
| External Key Quantity | 3 |
| Material | STEEL COMP 4340 OVERALL |
| Hole Diameter | 56.0 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| 44284-31 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-106-3263 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-106-3263: Overall Distance Including Keys: 90.0 MILLIMETERS MINIMUM AND 90.5 MILLIMETERS MAXIMUM MM; Hardness Rating: 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM; Style Designator: KEY; Material Document and Classification: MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 10 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.