The Washer,flat, cataloged under National Stock Number 5310-01-502-4822, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-502-4822 |
| Primary Part Number | 4M398-6 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Center Hole Width | 1.262 INCHES NOMINAL IN |
| Length | 1.889 INCHES NOMINAL IN |
| Radius at Large End | 0.695 INCHES NOMINAL IN |
| Criticality Code Justification | AGAV |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | OVAL |
| Width | 1.389 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Center Hole Shape Style | DEE |
| Hole Diameter | 1.134 INCHES NOMINAL IN |
| Radius at Small End | 1.194 INCHES NOMINAL IN |
| Thickness | 0.030 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 | Y |
| Part Number | Manufacturer |
|---|---|
| 4M398-6 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 4M398-6 | 5/9 Secondary reference Cablecraft Motion Controls Llc |
| 4M398-6 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-502-4822 is a Washer,flat, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-502-4822 has 1 manufacturer part number on file: 4M398-6 (The Boeing Company Div Defense).
Key specifications for 4M398-6: Center Hole Width: 1.262 INCHES NOMINAL IN; Length: 1.889 INCHES NOMINAL IN; Radius at Large End: 0.695 INCHES NOMINAL IN; Criticality Code Justification: AGAV. 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.