The Packing Nut, cataloged under National Stock Number 4730-01-123-4151, 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 Simmonds Precision Products Inc. Government technical data includes 14 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-123-4151 |
| Primary Part Number | S44181 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Simmonds Precision Products Inc |
| Status | ACTIVE |
| Length to Shoulder | 0.562 INCHES NOMINAL IN |
| Width Across Flats | 1.010 INCHES NOMINAL IN |
| Material Hardness Rating | 32.0 ROCKWELL A MINIMUM AND 36.0 ROCKWELL A MAXIMUM |
| Thread Length | 0.020 INCHES NOMINAL IN |
| Style Designator | HEXAGON, INTERNAL THREAD, SHOULDERED |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | CASEHARDENED |
| Thread Size | 5/8-20 |
| Screw Thread Series Designator | UNEF |
| Surface Treatment | CADMIUM |
| Major Unthreaded Outside Diameter | 1.062 INCHES NOMINAL IN |
| Screw Thread Location | INTERNAL |
| Material | STEEL COMP 4340 |
| Smallest Inside Diameter | 0.609 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 |
|---|---|
| S44181 PRIMARY | Simmonds Precision Products Inc (USA) |
NSN 4730-01-123-4151 is a Packing Nut, manufactured by Simmonds Precision Products Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-123-4151 has 1 manufacturer part number on file: S44181 (Simmonds Precision Products Inc).
Key specifications for S44181: Length to Shoulder: 0.562 INCHES NOMINAL IN; Width Across Flats: 1.010 INCHES NOMINAL IN; Material Hardness Rating: 32.0 ROCKWELL A MINIMUM AND 36.0 ROCKWELL A MAXIMUM; Thread Length: 0.020 INCHES NOMINAL IN. 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.