The Packing Nut, cataloged under National Stock Number 4730-00-554-9101, 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 Ge Aviation Systems Llc Dba Ge Aviation Systems Llc. 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 | 4730-00-554-9101 |
| Primary Part Number | DYLZ203 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Ge Aviation Systems Llc Dba Ge Aviation Systems Llc |
| Status | ACTIVE |
| Length to Shoulder | 0.375 INCHES NOMINAL IN |
| Width Across Flats | 1.000 INCHES NOMINAL IN |
| Material Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM |
| Largest Inside Diameter | 0.563 INCHES NOMINAL IN |
| Thread Length | 0.406 INCHES NOMINAL IN |
| Style Designator | HEXAGON, EXTERNAL THREAD, INTERNAL SHOUL DER |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 3/4IN-16 IN |
| Screw Thread Series Designator | UNF |
| Thread Class | 3A A |
| Screw Thread Location | EXTERNAL |
| Material | STEEL UNS J03001 |
| Smallest Inside Diameter | 0.386 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 |
|---|---|
| DYLZ203 PRIMARY | Ge Aviation Systems Llc Dba Ge Aviation Systems Llc (USA) |
NSN 4730-00-554-9101 is a Packing Nut, manufactured by Ge Aviation Systems Llc Dba Ge Aviation Systems Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-554-9101 has 1 manufacturer part number on file: DYLZ203 (Ge Aviation Systems Llc Dba Ge Aviation Systems Llc).
Key specifications for DYLZ203: Length to Shoulder: 0.375 INCHES NOMINAL IN; Width Across Flats: 1.000 INCHES NOMINAL IN; Material Hardness Rating: 30.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM; Largest Inside Diameter: 0.563 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.