The Washer,key, cataloged under National Stock Number 5310-01-485-0820, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-485-0820 |
| Primary Part Number | 5520467 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Finish | 1.6 MICROMETERS ALL SURFACES |
| Internal Straight Key Width | 4.030 MILLIMETERS MINIMUM AND 4.078 MILLIMETERS MAXIMUM MM |
| Distance From Centerline to Top of Internal Key | 19.8 MILLIMETERS MINIMUM AND 19.9 MILLIMETERS MAXIMUM MM |
| Hardness Rating | 20.0 ROCKWELL C MINIMUM AND 25.0 ROCKWELL C MAXIMUM |
| Style Designator | KEY |
| Material Document and Classification | AISI1040-1045 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 40.0 MILLIMETERS NOMINAL MM |
| Material Thickness | 2.85 MILLIMETERS MINIMUM AND 3.15 MILLIMETERS MAXIMUM MM |
| Surface Treatment | PHOSPHATE OVERALL |
| Material | STEEL COMP 1040 OR STEEL COMP 1042 OR STEEL COMP 1043 OR STEEL COMP 1044 OR STEEL COMP 1045 OVERALL |
| Internal Key Quantity | 1 |
| Hole Diameter | 18.1 MILLIMETERS MINIMUM AND 18.2 MILLIMETERS MAXIMUM MM |
| 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 |
|---|---|
| 5520467 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5310-01-485-0820 is a Washer,key, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-485-0820 has 1 manufacturer part number on file: 5520467 (Naval Sea Systems Command).
Key specifications for 5520467: Surface Finish: 1.6 MICROMETERS ALL SURFACES; Internal Straight Key Width: 4.030 MILLIMETERS MINIMUM AND 4.078 MILLIMETERS MAXIMUM MM; Distance From Centerline to Top of Internal Key: 19.8 MILLIMETERS MINIMUM AND 19.9 MILLIMETERS MAXIMUM MM; Hardness Rating: 20.0 ROCKWELL C MINIMUM AND 25.0 ROCKWELL C MAXIMUM. 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.