The Washer,key, cataloged under National Stock Number 5310-00-478-4838, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 10 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-478-4838 |
| Primary Part Number | 30F38475-4 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Internal Prebent Key Width | 0.087 INCHES MINIMUM AND 0.092 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 0.670 INCHES MINIMUM AND 0.720 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Outside Diameter | 0.440 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN |
| Material Thickness | 0.030 INCHES NOMINAL IN |
| External Straight Key Width | 0.087 INCHES MINIMUM AND 0.092 INCHES MAXIMUM IN |
| External Key Quantity | 9 |
| Internal Prebent Key Length | 0.115 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN |
| Material | STEEL OVERALL |
| Hole Diameter | 0.318 INCHES MINIMUM AND 0.328 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 |
| Part Number | Manufacturer |
|---|---|
| 30F38475-4 PRIMARY | Northrop Grumman Systems Corporation (USA) |
NSN 5310-00-478-4838 is a Washer,key, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-478-4838 has 1 manufacturer part number on file: 30F38475-4 (Northrop Grumman Systems Corporation).
Key specifications for 30F38475-4: Internal Prebent Key Width: 0.087 INCHES MINIMUM AND 0.092 INCHES MAXIMUM IN; Overall Distance Including Keys: 0.670 INCHES MINIMUM AND 0.720 INCHES MAXIMUM IN; Style Designator: KEY; Outside Diameter: 0.440 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN. 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.