The Nut,plain,cap, cataloged under National Stock Number 5310-00-596-6668, 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 13 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 | 5310-00-596-6668 |
| Primary Part Number | P21D4852 |
| Item Name | Nut,plain,cap |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Westinghouse Electric Corp |
| Status | ACTIVE |
| Width Across Flats | 0.547 INCHES MINIMUM AND 0.578 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-P-6859,CL C MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNEF |
| Material Document and Classification | QQ-B-626 COMP B FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.375 INCHES IN |
| Nut Height | 0.560 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN |
| Surface Treatment | NICKEL OVERALL |
| Nut Style | CAP |
| Thread Class | 2B |
| Thread Quantity Per Inch | 32 |
| Material | COPPER ALLOY 360 OVERALL |
| Bearing Surface Type | WASHER FACED |
| 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 |
|---|---|
| P21D4852 PRIMARY | Westinghouse Electric Corp (USA) |
NSN 5310-00-596-6668 is a Nut,plain,cap, manufactured by Westinghouse Electric Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-596-6668 has 1 manufacturer part number on file: P21D4852 (Westinghouse Electric Corp).
Key specifications for P21D4852: Width Across Flats: 0.547 INCHES MINIMUM AND 0.578 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-P-6859,CL C MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNEF; Material Document and Classification: QQ-B-626 COMP B FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 13 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.