The Nut,plain,castellated,hexagon, cataloged under National Stock Number 5310-00-059-5242, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is J.t. Slocomb Corp. Government technical data includes 12 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-059-5242 |
| Primary Part Number | 638328 |
| Item Name | Nut,plain,castellated,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | J.t. Slocomb Corp |
| Status | ACTIVE |
| Width Across Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Bearing Surface Finish | 63.0 MICROINCHES |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Material Document and Classification | AMS 5625 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Height | 0.330 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN |
| Nut Style | CASTELLATED, HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | STEEL 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 |
|---|---|
| 638328 | J.t. Slocomb Corp (USA) |
| Reference | Meaning |
|---|---|
| 638328 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| 638328 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 638328 | 3/2 Design control — primary reference U.S. Government activity |
| 638328 | 5/9 Secondary reference Royal Oak Gage, Inc |
NSN 5310-00-059-5242 is a Nut,plain,castellated,hexagon, manufactured by J.t. Slocomb Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-059-5242 has 1 manufacturer part number on file: 638328 (J.t. Slocomb Corp).
Key specifications for 638328: Width Across Flats: 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN; Bearing Surface Finish: 63.0 MICROINCHES; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Material Document and Classification: AMS 5625 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 12 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.