The Packing Nut, cataloged under National Stock Number 4730-01-040-0104, 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 Steam Power Inc Dba Ge Steam Power, Inc Div General Electric. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-040-0104 |
| Primary Part Number | D171-300-306 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric |
| Status | ACTIVE |
| Width Across Flats | 1.683 INCHES NOMINAL IN |
| Seat Angle in Deg | 45.0 |
| Thread Length | 0.625 INCHES NOMINAL IN |
| Style Designator | HEXAGON, EXTERNAL THREAD, INVERTED FLARE |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 2-1/4-20 |
| Screw Thread Series Designator | UN |
| Thread Class | 2A A |
| Screw Thread Location | EXTERNAL |
| Material | STEEL COMP 1018 |
| Smallest Inside Diameter | 1.312 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 |
|---|---|
| D171-300-7PC306 | Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric (USA) |
| D171-300-306 PRIMARY | Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric (USA) |
| Reference | Meaning |
|---|---|
| D-171-300-9 PIE | C/1 Advisory reference — outside the item-of-supply concept Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric |
NSN 4730-01-040-0104 is a Packing Nut, manufactured by Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-040-0104 has 2 manufacturer part numbers on file: D171-300-7PC306 (Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric), D171-300-306 (Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric).
Key specifications for D171-300-306: Width Across Flats: 1.683 INCHES NOMINAL IN; Seat Angle in Deg: 45.0; Thread Length: 0.625 INCHES NOMINAL IN; Style Designator: HEXAGON, EXTERNAL THREAD, INVERTED FLARE. 12 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.