The Washer,recessed, cataloged under National Stock Number 5310-00-281-2396, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Westinghouse Electric Corp. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-281-2396 |
| Primary Part Number | 20J910PC280 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Westinghouse Electric Corp |
| Status | ACTIVE |
| Top Recess Diameter | 1.250 INCHES NOMINAL IN |
| Bottom Recess Diameter | 1.250 INCHES NOMINAL IN |
| Top Recess Angle | 90.0 DEGREES NOMINAL |
| Style Designator | RECESSED BOTH SIDES |
| Material Document and Classification | MIL-S-20166 GRADE M MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 3.250 INCHES NOMINAL IN |
| Material Thickness | 0.500 INCHES NOMINAL IN |
| Bottom Recess Angle | 90.0 DEGREES NOMINAL |
| Material | STEEL OVERALL |
| Hole Diameter | 1.0625 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 |
|---|---|
| 20J910PC280 PRIMARY | Westinghouse Electric Corp (USA) |
| 1387057 PRIMARY | Westinghouse Electric Corp (USA) |
| Reference | Meaning |
|---|---|
| 1387057 | 5/9 Secondary reference Westinghouse Electric Corp Control Business Unit |
| 20J910PC280 | 5/9 Secondary reference Westinghouse Electric Corp Control Business Unit |
NSN 5310-00-281-2396 is a Washer,recessed, manufactured by Westinghouse Electric Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-281-2396 has 2 manufacturer part numbers on file: 20J910PC280 (Westinghouse Electric Corp), 1387057 (Westinghouse Electric Corp).
Key specifications for 20J910PC280: Top Recess Diameter: 1.250 INCHES NOMINAL IN; Bottom Recess Diameter: 1.250 INCHES NOMINAL IN; Top Recess Angle: 90.0 DEGREES NOMINAL; Style Designator: RECESSED BOTH SIDES. 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.