The Washer,key, cataloged under National Stock Number 5310-00-222-0712, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-222-0712 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Internal Straight Key Width | 0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 0.750 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | ASTM B633,TYPE 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | KEY |
| Material Document and Classification | ASTM A108 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 2.250 INCHES MINIMUM AND 2.280 INCHES MAXIMUM IN |
| Material Thickness | 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Material | STEEL COMP 1010 OR STEEL COMP 1018 OR STEEL COMP 1025 OVERALL |
| Internal Key Quantity | 1 |
| Hole Diameter | 1.755 INCHES MINIMUM AND 1.765 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 |
|---|---|
| MS21258Z28 | 5/9 Secondary reference U.S. Government activity |
| MS21258Z28 | 3/2 Design control — primary reference U.S. Government activity |
| AN7503-28 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-222-0712 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-222-0712: Internal Straight Key Width: 0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 0.750 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ASTM B633,TYPE 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Style Designator: KEY. 11 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.