The Washer,key, cataloged under National Stock Number 5310-01-391-3556, 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11 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-391-3556 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Internal Prebent Key Width | 0.219 INCHES MINIMUM AND 0.239 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 2.814 INCHES MINIMUM AND 2.844 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 6350 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 2.406 INCHES MINIMUM AND 2.426 INCHES MAXIMUM IN |
| Material Thickness | 0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN |
| External Straight Key Width | 0.204 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN |
| External Key Quantity | 17 |
| Internal Prebent Key Length | 0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Material | STEEL COMP 4130 OVERALL |
| Hole Diameter | 1.900 INCHES MINIMUM AND 1.925 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 |
|---|---|
| 2881639 | 3/2 Design control — primary reference U.S. Government activity |
| 2881639 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-391-3556 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-391-3556: Internal Prebent Key Width: 0.219 INCHES MINIMUM AND 0.239 INCHES MAXIMUM IN; Overall Distance Including Keys: 2.814 INCHES MINIMUM AND 2.844 INCHES MAXIMUM IN; Material Document and Classification: AMS 6350 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 2.406 INCHES MINIMUM AND 2.426 INCHES MAXIMUM IN. 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.