The Packing Nut, cataloged under National Stock Number 4730-00-289-9174, 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 Amphenol Corporation Dba Amphenol Aerospace Industrial Div Amphenol Aerospace/pyle National. Government technical data includes 11 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 | 4730-00-289-9174 |
| Primary Part Number | DB4B |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Amphenol Corporation Dba Amphenol Aerospace Industrial Div Amphenol Aerospace/pyle National |
| Status | ACTIVE |
| Thread Length | 0.437 INCHES NOMINAL IN |
| Style Designator | HEXAGON, INTERNAL THREAD, SHOULDERED |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 0.750-18 |
| Screw Thread Series Designator | UNS |
| Thread Class | 3B |
| Major Unthreaded Outside Diameter | 0.875 INCHES NOMINAL IN |
| Screw Thread Location | INTERNAL |
| Material | ALUMINUM ALLOY |
| Smallest Inside Diameter | 0.437 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 |
|---|---|
| DB4B PRIMARY | Amphenol Corporation Dba Amphenol Aerospace Industrial Div Amphenol Aerospace/pyle National (USA) |
NSN 4730-00-289-9174 is a Packing Nut, manufactured by Amphenol Corporation Dba Amphenol Aerospace Industrial Div Amphenol Aerospace/pyle National, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-289-9174 has 1 manufacturer part number on file: DB4B (Amphenol Corporation Dba Amphenol Aerospace Industrial Div Amphenol Aerospace/pyle National).
Key specifications for DB4B: Thread Length: 0.437 INCHES NOMINAL IN; Style Designator: HEXAGON, INTERNAL THREAD, SHOULDERED; Overall Length: 0.812 INCHES NOMINAL IN; Thread Direction: RIGHT-HAND. 11 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.