The Packing Nut, cataloged under National Stock Number 4730-00-394-4728, 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 Hamilton Sundstrand Corporation Dba Collins Aerospace. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-394-4728 |
| Primary Part Number | 556032-2 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| Length to Shoulder | 0.380 INCHES NOMINAL IN |
| Width Across Flats | 0.996 INCHES MINIMUM AND 1.003 INCHES MAXIMUM IN |
| Material Hardness Rating | 70.0 ROCKWELL B MINIMUM AND 100.0 ROCKWELL B MAXIMUM |
| Thread Length | 0.278 INCHES NOMINAL IN |
| Style Designator | HEXAGON, INTERNAL THREAD, SHOULDERED |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 7/8IN-20 IN |
| Screw Thread Series Designator | UNJEF |
| Thread Class | 3B |
| Screw Thread Location | INTERNAL |
| Material | STEEL COMP 347 |
| Smallest Inside Diameter | 0.330 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 |
|---|---|
| 556032-2 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
NSN 4730-00-394-4728 is a Packing Nut, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-394-4728 has 1 manufacturer part number on file: 556032-2 (Hamilton Sundstrand Corporation Dba Collins Aerospace).
Key specifications for 556032-2: Length to Shoulder: 0.380 INCHES NOMINAL IN; Width Across Flats: 0.996 INCHES MINIMUM AND 1.003 INCHES MAXIMUM IN; Material Hardness Rating: 70.0 ROCKWELL B MINIMUM AND 100.0 ROCKWELL B MAXIMUM; Thread Length: 0.278 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.