The Nut,self-Locking,round, cataloged under National Stock Number 5310-01-131-2947, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 22 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-131-2947 |
| Primary Part Number | 74B580172-101 |
| Item Name | Nut,self-Locking,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Bearing Surface Finish | 63.0 MICROINCHES |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 2,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT |
| Thread Series | UNIFIED NATIONAL JOINT (UNJ) |
| Material Document and Classification | QQ-A-225/6,T851 FED SPEC SINGLE MATERIAL RESPONSE OVERALL EXCEPT INSERT |
| Nut Counterbore Depth | 0.095 INCHES MINIMUM AND 0.105 INCHES MAXIMUM WASHER IN |
| Drive Point Width | 0.350 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 2.000 INCHES IN |
| Nut Diameter | 2.255 INCHES MINIMUM AND 2.265 INCHES MAXIMUM IN |
| Counterbore Diameter | 2.075 INCHES MINIMUM AND 2.085 INCHES MAXIMUM WASHER IN |
| Drive Point Depth | 2.280 INCHES NOMINAL IN |
| Undercut Thickness | 0.210 INCHES NOMINAL IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Thickness | 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN |
| Small End Diameter | 2.260 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE OVERALL EXCEPT INSERT |
| Drive Point Quantity | 12 |
| Nut Style | ROUND |
| Thread Class | 3B |
| Thread Quantity Per Inch | 16 |
| Material | ALUMINUM ALLOY 2024 OVERALL EXCEPT INSERT |
| Material | PLASTIC POLYETHYLENE TEREPHTHALATE (PET)(POLYESTER) LOCKING INSERT |
| 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 |
|---|---|
| 74B580172-101 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| LS580172-101 | 5/9 Secondary reference Long-Lok, Llc |
NSN 5310-01-131-2947 is a Nut,self-Locking,round, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-131-2947 has 1 manufacturer part number on file: 74B580172-101 (The Boeing Company Div Defense).
Key specifications for 74B580172-101: Bearing Surface Finish: 63.0 MICROINCHES; Surface Treatment Document and Classification: MIL-A-8625,TYPE 2,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT; Thread Series: UNIFIED NATIONAL JOINT (UNJ); Material Document and Classification: QQ-A-225/6,T851 FED SPEC SINGLE MATERIAL RESPONSE OVERALL EXCEPT INSERT. 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.