The Nut,plain,round, cataloged under National Stock Number 5310-00-394-8026, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Siemens Energy, Inc.. Government technical data includes 14 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 | 5310-00-394-8026 |
| Primary Part Number | NC402AJ |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Siemens Energy, Inc. |
| Status | ACTIVE |
| Width Across Flats | 4.000 INCHES NOMINAL IN |
| Hole Thread Quantity Per Inch | 20 |
| Thread Series | UNS |
| Hole Configuration Style | CONFIGURATION J |
| Thread Direction | LEFT-HAND |
| Nominal Thread Size | 2.750 INCHES IN |
| Nut Diameter | 4.500 INCHES NOMINAL IN |
| Nut Thickness | 0.625 INCHES NOMINAL IN |
| Nut Style | ROUND |
| Thread Class | 2B |
| Hole Nominal Thread Diameter | 0.250 INCHES IN |
| Thread Quantity Per Inch | 14 |
| Material | STEEL OVERALL |
| Hole Type and Quantity | 1 TAPPED |
| 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 |
|---|---|
| G10231PC73 | Siemens Energy, Inc. (USA) |
| NC402AJ PRIMARY | Siemens Energy, Inc. (USA) |
NSN 5310-00-394-8026 is a Nut,plain,round, manufactured by Siemens Energy, Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-394-8026 has 2 manufacturer part numbers on file: G10231PC73 (Siemens Energy, Inc.), NC402AJ (Siemens Energy, Inc.).
Key specifications for NC402AJ: Width Across Flats: 4.000 INCHES NOMINAL IN; Hole Thread Quantity Per Inch: 20; Thread Series: UNS; Hole Configuration Style: CONFIGURATION J. 14 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.