The Washer,key, cataloged under National Stock Number 5310-00-209-3772, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-209-3772 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Distance Including Keys | 2.440 INCHES MINIMUM AND 2.460 INCHES MAXIMUM IN |
| Hardness Rating | 12.0 ROCKWELL C MINIMUM AND 23.0 ROCKWELL C MAXIMUM |
| Style Designator | KEY |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 2.090 INCHES MINIMUM AND 2.110 INCHES MAXIMUM IN |
| Material Thickness | 0.077 INCHES MINIMUM AND 0.089 INCHES MAXIMUM IN |
| External Straight Key Width | 0.170 INCHES MINIMUM AND 0.185 INCHES MAXIMUM IN |
| External Key Quantity | 1 |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Material | STEEL COMP 4130 OVERALL |
| Hole Diameter | 1.790 INCHES MINIMUM AND 1.810 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 |
|---|---|
| 3-74404-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-209-3772 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-209-3772: Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Distance Including Keys: 2.440 INCHES MINIMUM AND 2.460 INCHES MAXIMUM IN; Hardness Rating: 12.0 ROCKWELL C MINIMUM AND 23.0 ROCKWELL C MAXIMUM; Style Designator: KEY. 12 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.