The Washer,key, cataloged under National Stock Number 5310-00-943-0899, 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13 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-943-0899 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Internal Straight Key Width | 0.112 INCHES MINIMUM AND 0.122 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 0.260 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 1.242 INCHES MINIMUM AND 1.262 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 0.763 INCHES MINIMUM AND 0.783 INCHES MAXIMUM IN |
| Material Thickness | 0.044 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN |
| External Straight Key Width | 0.220 INCHES MAXIMUM IN |
| External Key Quantity | 7 |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Material | STEEL COMP 1005 OR STEEL COMP 1006 OR STEEL COMP 1035 OVERALL |
| Internal Key Quantity | 1 |
| Hole Diameter | 0.564 INCHES MINIMUM AND 0.574 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 |
|---|---|
| MS27111-6 | 2/2 Government specification standardization U.S. Government activity |
NSN 5310-00-943-0899 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-943-0899: Internal Straight Key Width: 0.112 INCHES MINIMUM AND 0.122 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 0.260 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN; Overall Distance Including Keys: 1.242 INCHES MINIMUM AND 1.262 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.