The Nut,plain,round, cataloged under National Stock Number 5310-00-068-1771, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-068-1771 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Thread Series | UN |
| Criticality Code Justification | FEAT |
| Hole Configuration Style | CONFIGURATION J |
| Material Document and Classification | MIL-S-6758,COND D1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Drive Point Width | 0.312 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 3.500 INCHES IN |
| Nut Diameter | 4.200 INCHES NOMINAL IN |
| Drive Point Depth | 0.190 INCHES NOMINAL IN |
| Nut Thickness | 0.310 INCHES NOMINAL IN |
| Drilled Hole Diameter | 0.071 INCHES NOMINAL IN |
| Surface Treatment | CHROMIUM AND NICKEL OVERALL |
| Countersink Angle | 90.0 DEGREES NOMINAL NUT |
| Drive Point Quantity | 4 |
| Nut Style | ROUND |
| Thread Class | 3B |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP 4130 OVERALL |
| Hole Type and Quantity | 4 DRILLED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| 394031-3 | 3/2 Design control — primary reference U.S. Government activity |
| 394031-1 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-068-1771 is a Nut,plain,round, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-068-1771: Thread Series: UN; Criticality Code Justification: FEAT; Hole Configuration Style: CONFIGURATION J; Material Document and Classification: MIL-S-6758,COND D1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 19 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.