The Washer,key, cataloged under National Stock Number 5310-00-209-3789, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-00-209-3789 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Internal Straight Key Width | 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 0.281 INCHES NOMINAL IN |
| Style Designator | KEY |
| Material Document and Classification | MIL-S-18729,COND N MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.469 INCHES MINIMUM AND 1.531 INCHES MAXIMUM IN |
| Material Thickness | 0.032 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL COMP 4130 OVERALL |
| Internal Key Quantity | 1 |
| Hole Diameter | 0.646 INCHES MINIMUM AND 0.666 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 |
|---|---|
| 2397809 | 3/2 Design control — primary reference U.S. Government activity |
| 2397809 | 5/9 Secondary reference The Boeing Company |
NSN 5310-00-209-3789 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-209-3789: Internal Straight Key Width: 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 0.281 INCHES NOMINAL IN; Style Designator: KEY; Material Document and Classification: MIL-S-18729,COND N MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 10 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.