The Washer,key, cataloged under National Stock Number 5310-00-674-0551, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Raytheon Company Dba Raytheon Co. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-674-0551 |
| Primary Part Number | 2057-1596 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Raytheon Company Dba Raytheon Co |
| Status | ACTIVE |
| Overall Distance Including Keys | 0.718 INCHES NOMINAL IN |
| Outside Diameter | 0.572 INCHES NOMINAL IN |
| Material Thickness | 0.048 INCHES NOMINAL IN |
| External Straight Key Width | 0.114 INCHES NOMINAL IN |
| External Key Quantity | 3 |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL CORROSION RESISTING OVERALL |
| Hole Diameter | 0.317 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 2057-1596 | Raytheon Company (USA) |
| 2057-1596 PRIMARY | Raytheon Company Dba Raytheon Co (USA) |
| Reference | Meaning |
|---|---|
| 2057-1596 | 5/9 Secondary reference Raytheon Co Missile Systems Div Lowell Plant |
| 2057-1596 | 5/9 Secondary reference Raytheon Company Div Corp |
NSN 5310-00-674-0551 is a Washer,key, manufactured by Raytheon Company Dba Raytheon Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-674-0551 has 2 manufacturer part numbers on file: 2057-1596 (Raytheon Company), 2057-1596 (Raytheon Company Dba Raytheon Co).
Key specifications for 2057-1596: Overall Distance Including Keys: 0.718 INCHES NOMINAL IN; Outside Diameter: 0.572 INCHES NOMINAL IN; Material Thickness: 0.048 INCHES NOMINAL IN; External Straight Key Width: 0.114 INCHES NOMINAL IN. 8 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.