The Packing Nut, cataloged under National Stock Number 4730-01-131-7571, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is The Boeing Company Div Defense. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-131-7571 |
| Primary Part Number | 74B580177-101 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Length to Shoulder | 0.391 INCHES NOMINAL IN |
| Thread Length | 0.484 INCHES NOMINAL IN |
| Style Designator | ROUND, INTERNAL THREAD, SHOULDERED |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 3-1/4-16 |
| Protrusion Quantity | 12 |
| Screw Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) |
| Thread Class | 2B |
| Major Unthreaded Outside Diameter | 3.781 INCHES NOMINAL IN |
| Screw Thread Location | INTERNAL |
| Material | ALUMINUM ALLOY 2024 |
| Smallest Inside Diameter | 3.309 INCHES NOMINAL IN |
| 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 |
|---|---|
| 74B580177-101 PRIMARY | The Boeing Company Div Defense (USA) |
| 74B580177-101 | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| Reference | Meaning |
|---|---|
| LS580177 | 5/9 Secondary reference Long-Lok, Llc |
| LS580177-101 | 5/9 Secondary reference Long-Lok, Llc |
| 74B580177 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 4730-01-131-7571 is a Packing Nut, manufactured by The Boeing Company Div Defense, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-131-7571 has 2 manufacturer part numbers on file: 74B580177-101 (The Boeing Company Div Defense), 74B580177-101 (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems).
Key specifications for 74B580177-101: Length to Shoulder: 0.391 INCHES NOMINAL IN; Thread Length: 0.484 INCHES NOMINAL IN; Style Designator: ROUND, INTERNAL THREAD, SHOULDERED; Overall Length: 0.500 INCHES NOMINAL 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.