The Nut,plain,round, cataloged under National Stock Number 5310-00-221-3866, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-221-3866 |
| Primary Part Number | TP10740 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Material Document and Classification | QQ-B-637 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Drive Point Width | 0.058 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Diameter | 0.401 INCHES MINIMUM AND 0.411 INCHES MAXIMUM IN |
| Drive Point Depth | 0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN |
| Nut Thickness | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN |
| Drive Point Quantity | 2 |
| Nut Style | ROUND |
| Thread Class | 2B |
| Thread Quantity Per Inch | 20 |
| Material | COPPER ALLOY 462 OR COPPER ALLOY 464 OR COPPER ALLOY 482 OR COPPER ALLOY 485 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5310-00-221-3866 is a Nut,plain,round, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-221-3866 has 2 manufacturer part numbers on file: TP10740 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), SP10740 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for TP10740: Thread Series: UNIFIED NATIONAL COARSE (UNC); Material Document and Classification: QQ-B-637 FED SPEC ALL MATERIAL RESPONSES OVERALL; Drive Point Width: 0.058 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN; Thread Direction: RIGHT-HAND. 13 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.