The Washer,key, cataloged under National Stock Number 5310-00-262-6180, 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16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-262-6180 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALLQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Internal Prebent Key Width | 0.250 INCHES MINIMUM AND 0.250 INCHES MINIMUM AND 0.290 INCHES MAXIMUM0.290 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 2.469 INCHES NOMINAL2.469 INCHES NOMINAL IN |
| Hardness Rating | 60.0 ROCKWELL B MINIMUM AND 60.0 ROCKWELL B MINIMUM AND 70.0 ROCKWELL B MAXIMUM70.0 ROCKWELL B MAXIMUM |
| Style Designator | KEYKEY |
| Material Document and Classification | MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALLMIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 2.000 INCHES MINIMUM AND 2.000 INCHES MINIMUM AND 2.030 INCHES MAXIMUM2.030 INCHES MAXIMUM IN |
| Material Thickness | 0.058 INCHES MINIMUM AND 0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM0.068 INCHES MAXIMUM IN |
| External Key Quantity | 1515 |
| Internal Prebent Key Length | 0.215 INCHES MINIMUM AND 0.215 INCHES MINIMUM AND 0.235 INCHES MAXIMUM0.235 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CADMIUM AND CHROMATE OVERALLCHROMATE OVERALL |
| Minimum Tensile Strength | 55 POUNDS PER SQUARE INCH55 POUNDS PER SQUARE INCH LBS |
| External Prebent Key Width | 0.205 INCHES MINIMUM AND 0.205 INCHES MINIMUM AND 0.235 INCHES MAXIMUM0.235 INCHES MAXIMUM IN |
| Material | STEEL COMP 4130 OVERALL |
| Internal Key Quantity | 11 |
| Hole Diameter | 1.583 INCHES MINIMUM AND 1.583 INCHES MINIMUM AND 1.603 INCHES MAXIMUM1.603 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 |
|---|---|
| K474142-3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-262-6180 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-262-6180: Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALLQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Internal Prebent Key Width: 0.250 INCHES MINIMUM AND 0.250 INCHES MINIMUM AND 0.290 INCHES MAXIMUM0.290 INCHES MAXIMUM IN; Overall Distance Including Keys: 2.469 INCHES NOMINAL2.469 INCHES NOMINAL IN; Hardness Rating: 60.0 ROCKWELL B MINIMUM AND 60.0 ROCKWELL B MINIMUM AND 70.0 ROCKWELL B MAXIMUM70.0 ROCKWELL B MAXIMUM. 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.