The Inverted Nut,tube Coupling, cataloged under National Stock Number 4730-00-458-4541, 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 15 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-458-4541 |
| Item Name | Inverted Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Width Across Flats | 1.000 INCHES NOMINAL IN |
| Material Hardness Rating | 24.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| Seat Angle in Deg | 45.0 |
| Tube Outside Diameter for Which Designed | 0.764 INCHES MINIMUM AND 0.774 INCHES MAXIMUM IN |
| Criticality Code Justification | MATT |
| Style Designator | INVERTED NUT, TUBE, FLARE |
| Material Document and Classification | AMS 5612 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 7/8-14 |
| Screw Thread Series Designator | UNF |
| Thread Class | 3A A |
| Material | STEEL COMP 410 |
| Fabrication Method | BAR STOCK, MACHINED |
| Smallest Inside Diameter | 0.688 INCHES MINIMUM AND 0.691 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| 4G13305 | D/9 Drawing number reference only U.S. Government activity |
| 4G13305-101A | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-00-458-4541 is a Inverted Nut,tube Coupling, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-00-458-4541: Width Across Flats: 1.000 INCHES NOMINAL IN; Material Hardness Rating: 24.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM; Seat Angle in Deg: 45.0; Tube Outside Diameter for Which Designed: 0.764 INCHES MINIMUM AND 0.774 INCHES MAXIMUM IN. 15 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.