The Nut,plain,round, cataloged under National Stock Number 5310-01-210-6258, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-210-6258 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Bearing Surface Finish | 63.0 MICROINCHES |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UN |
| Hardness Rating | 28.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | ASTM A331 ASSN STD ALL MATERIAL RESPONSES OR AMS 6414 ASSN STD 3RD MATERIAL RESPONSE OR AMS 6415 ASSN STD 3RD MATERIAL RESPONSE OR ASTM A322 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Nut Counterbore Depth | 0.050 INCHES MINIMUM AND 0.070 INCHES MAXIMUM FIRST END IN |
| Drive Point Width | 0.180 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 2.125 INCHES IN |
| Nut Diameter | 2.490 INCHES MINIMUM AND 2.510 INCHES MAXIMUM IN |
| Counterbore Diameter | 2.125 INCHES MINIMUM AND 2.135 INCHES MAXIMUM FIRST END IN |
| Drive Point Depth | 0.105 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN |
| Undercut Thickness | 0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Nut Thickness | 0.340 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN |
| Small End Diameter | 2.175 INCHES MINIMUM AND 2.195 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Countersink Angle | 90.0 DEGREES NOMINAL SECOND END |
| Drive Point Quantity | 4 |
| Nut Style | ROUND |
| Thread Class | 2B |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 4130 OR STEEL COMP 4140 OR 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 |
|---|---|
| 3860369-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-210-6258 is a Nut,plain,round, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-210-6258: Bearing Surface Finish: 63.0 MICROINCHES; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UN; Hardness Rating: 28.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM. 22 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.