The Packing Nut, cataloged under National Stock Number 4730-00-004-4837, 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 Bae Systems (operations) Limited. 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 | 4730-00-004-4837 |
| Primary Part Number | 3724-3773-001 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Bae Systems (operations) Limited |
| Status | ACTIVE |
| Length to Shoulder | 0.225 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN |
| Width Across Flats | 0.750 INCHES NOMINAL IN |
| Thread Length | 0.201 INCHES NOMINAL IN |
| Style Designator | HEXAGON, INTERNAL THREAD, SHOULDERED |
| Material Document and Classification | QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OR MIL-W-52263 MIL SPEC SINGLE MATERIAL RESPONSE |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 0.562-18 |
| Screw Thread Series Designator | UNF |
| Surface Treatment | PASSIVATE OR CHROMATE ZINC |
| Thread Class | 2B |
| Screw Thread Location | INTERNAL |
| Material | STEEL CORROSION RESISTING |
| Smallest Inside Diameter | 0.299 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 |
|---|---|
| 3724-3773-001 PRIMARY | Bae Systems (operations) Limited (GBR) |
NSN 4730-00-004-4837 is a Packing Nut, manufactured by Bae Systems (operations) Limited, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-004-4837 has 1 manufacturer part number on file: 3724-3773-001 (Bae Systems (operations) Limited).
Key specifications for 3724-3773-001: Length to Shoulder: 0.225 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN; Width Across Flats: 0.750 INCHES NOMINAL IN; Thread Length: 0.201 INCHES NOMINAL IN; Style Designator: HEXAGON, INTERNAL THREAD, SHOULDERED. 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.