The Washer,flat, cataloged under National Stock Number 5310-01-157-2001, 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 11 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 | 5310-01-157-2001 |
| Primary Part Number | 201-4684482 ITEM 20 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES BOTTOM |
| Surface Finish | 63.0 MICROINCHES INNER |
| Surface Finish | 63.0 MICROINCHES TOP |
| Overall Diameter | 6.750 INCHES NOMINAL IN |
| Material Document and Classification | QQ-C-00465 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Inside Left Corner Chamfer Angle | 45.0 DEGREES NOMINAL |
| Peripheral Shape Style | ROUND |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 5.001 INCHES MINIMUM AND 5.002 INCHES MAXIMUM IN |
| Thickness | 1.000 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 |
|---|---|
| 201-4684482 ITEM 20 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5310-01-157-2001 is a Washer,flat, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-157-2001 has 1 manufacturer part number on file: 201-4684482 ITEM 20 (Naval Sea Systems Command).
Key specifications for 201-4684482 ITEM 20: Surface Finish: 63.0 MICROINCHES BOTTOM; Surface Finish: 63.0 MICROINCHES INNER; Surface Finish: 63.0 MICROINCHES TOP; Overall Diameter: 6.750 INCHES NOMINAL IN. 11 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.