The Washer,shouldered and Recessed, cataloged under National Stock Number 5310-00-213-9133, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Clayton Manufacturing Company. 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 | 5310-00-213-9133 |
| Primary Part Number | K6231 |
| Item Name | Washer,shouldered and Recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Clayton Manufacturing Company |
| Status | ACTIVE |
| Surface Finish | 100.0 MICROINCHES ALL SURFACES |
| Shoulder Height | 0.080 INCHES NOMINAL IN |
| Style Designator | SHOULDERED AND RECESSED |
| Outside Diameter | 2.190 INCHES NOMINAL IN |
| Material Thickness | 0.250 INCHES NOMINAL IN |
| Shoulder Diameter | 0.562 INCHES NOMINAL IN |
| Recess Diameter | 0.480 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.386 INCHES NOMINAL IN |
| Recess Angle | 45.0 DEGREES NOMINAL |
| 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 |
|---|---|
| K6231 PRIMARY | Clayton Manufacturing Company (USA) |
NSN 5310-00-213-9133 is a Washer,shouldered and Recessed, manufactured by Clayton Manufacturing Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-213-9133 has 1 manufacturer part number on file: K6231 (Clayton Manufacturing Company).
Key specifications for K6231: Surface Finish: 100.0 MICROINCHES ALL SURFACES; Shoulder Height: 0.080 INCHES NOMINAL IN; Style Designator: SHOULDERED AND RECESSED; Outside Diameter: 2.190 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.