The Nut,plain,round, cataloged under National Stock Number 5310-01-034-6638, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-034-6638 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Thread Series | UN |
| Temp Rating | 950.0 FAHRENHEIT NOMINAL DEGF |
| Nut Counterbore Depth | 1.000 INCHES NOMINAL NUT IN |
| Drive Point Width | 0.500 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.250 INCHES IN |
| Nut Diameter | 2.000 INCHES NOMINAL IN |
| Counterbore Diameter | 1.312 INCHES NOMINAL NUT IN |
| Drive Point Depth | 0.750 INCHES NOMINAL IN |
| Nut Thickness | 2.250 INCHES NOMINAL IN |
| Surface Treatment | COPPER THREADS |
| Surface Treatment | COPPER WASHER |
| Drive Point Quantity | 4 |
| Nut Style | ROUND |
| Thread Class | 2B |
| Thread Quantity Per Inch | 8 |
| Material | STEEL COMP 4340 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 |
|---|---|
| F402A125 | 3/9 Design control — primary reference General Electric Co Naval and Drive Turbine Systems Dept |
NSN 5310-01-034-6638 is a Nut,plain,round, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-034-6638: Thread Series: UN; Temp Rating: 950.0 FAHRENHEIT NOMINAL DEGF; Nut Counterbore Depth: 1.000 INCHES NOMINAL NUT IN; Drive Point Width: 0.500 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN. 17 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.