The Packing Nut, cataloged under National Stock Number 4730-00-936-8741, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-936-8741 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Width Across Flats | 1.500 INCHES NOMINAL IN |
| Seat Angle in Deg | 45.0 |
| Style Designator | HEXAGON, EXTERNAL THREAD, INVERTED FLARE |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 1-3/8-12 |
| Screw Thread Series Designator | UNF |
| Screw Thread Location | EXTERNAL |
| Material | COPPER ALLOY |
| Smallest Inside Diameter | 1.031 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 |
| Reference | Meaning |
|---|---|
| 3248B | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| 156425PC515 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 156425PC515 | 5/9 Secondary reference U.S. Government activity |
| 156425PC515 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| 3248B | 3/9 Design control — primary reference U.S. Government activity |
| 3248B | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 156425PC515 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-00-936-8741 is a Packing Nut, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-00-936-8741: Width Across Flats: 1.500 INCHES NOMINAL IN; Seat Angle in Deg: 45.0; Style Designator: HEXAGON, EXTERNAL THREAD, INVERTED FLARE; Overall Length: 1.125 INCHES NOMINAL IN. 10 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.