The Nut,plain,knurled, cataloged under National Stock Number 5310-00-500-6403, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-500-6403 |
| Item Name | Nut,plain,knurled |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | 0000040,TYPE 2,FSCM 30669 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNEF |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Diameter | 0.375 INCHES NOMINAL IN |
| Nut Thickness | 0.344 INCHES NOMINAL IN |
| Surface Treatment | NICKEL OVERALL |
| Nut Style | KNURLED |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | COPPER ALLOY OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 45012191 | 5/9 Secondary reference E and R Electronics Inc Dba Dumont Oscilloscope |
| 4501-2191 | 3/9 Design control — primary reference Duro Screw and Mfg Co |
NSN 5310-00-500-6403 is a Nut,plain,knurled, classified under FSC 5310, Nuts and Washers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5355-01-214-0555. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-00-500-6403: Surface Treatment Document and Classification: 0000040,TYPE 2,FSCM 30669 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNEF; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.250 INCHES 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.