The Inverted Nut,tube Coupling, cataloged under National Stock Number 4730-00-289-4758, 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 Caterpillar Inc Div Caterpillar Defense. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-289-4758 |
| Primary Part Number | 8F8996 |
| Item Name | Inverted Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Width Across Flats | 0.375 INCHES NOMINAL IN |
| Tube Outside Diameter for Which Designed | 0.188 INCHES NOMINAL IN |
| Style Designator | INVERTED NUT, TUBE, DOUBLE COMPRESSION |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 3/8-24 |
| Screw Thread Series Designator | UNF |
| Thread Class | 2A A |
| Material | COPPER ALLOY |
| Fabrication Method | FORGED |
| Smallest Inside Diameter | 0.190 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 |
|---|---|
| 8F8996 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| 81L3-16IN | 5/9 Secondary reference Imperial |
| 67646DX | 5/9 Secondary reference U.S. Government activity |
| 25038HA | 5/9 Secondary reference Navistar International Corporation Dba Navistar |
NSN 4730-00-289-4758 is a Inverted Nut,tube Coupling, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-289-4758 has 1 manufacturer part number on file: 8F8996 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 8F8996: Width Across Flats: 0.375 INCHES NOMINAL IN; Tube Outside Diameter for Which Designed: 0.188 INCHES NOMINAL IN; Style Designator: INVERTED NUT, TUBE, DOUBLE COMPRESSION; Overall Length: 0.688 INCHES NOMINAL IN. 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.