The Nut,self-Locking,round, cataloged under National Stock Number 5310-01-413-2666, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-413-2666 |
| Primary Part Number | 845-6556491 |
| Item Name | Nut,self-Locking,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Thread Series | UN |
| Drive Point Width | 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 5.750 INCHES IN |
| Nut Diameter | 6.711 INCHES MINIMUM AND 6.751 INCHES MAXIMUM IN |
| Undercut Thickness | 0.140 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN |
| Nut Thickness | 0.467 INCHES MINIMUM AND 0.472 INCHES MAXIMUM IN |
| Small End Diameter | 6.355 INCHES MINIMUM AND 6.395 INCHES MAXIMUM IN |
| Drive Point Quantity | 4 |
| Nut Style | ROUND |
| Thread Class | 2B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP 4147 OR STEEL COMP 4150 OVERALL |
| 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 |
|---|---|
| 845-6556491 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 845-6603141-42 | 5/9 Secondary reference Naval Sea Systems Command |
| 845-6603141 | 5/9 Secondary reference Naval Sea Systems Command |
NSN 5310-01-413-2666 is a Nut,self-Locking,round, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-413-2666 has 1 manufacturer part number on file: 845-6556491 (Naval Sea Systems Command).
Key specifications for 845-6556491: Thread Series: UN; Drive Point Width: 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN; Thread Direction: RIGHT-HAND; Nominal Thread Size: 5.750 INCHES IN. 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.