The Inverted Nut,tube Coupling, cataloged under National Stock Number 4730-00-908-3745, 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 Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-908-3745 |
| Primary Part Number | 7791303 |
| Item Name | Inverted Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
| Status | ACTIVE |
| Width Across Flats | 0.250 INCHES NOMINAL IN |
| Tube Outside Diameter for Which Designed | 0.125 INCHES NOMINAL IN |
| Style Designator | INVERTED NUT, TUBE, DOUBLE COMPRESSION |
| Material Document and Classification | SAE CA360 ASSN STD SINGLE MATERIAL RESPONSE OR QQ-B-626, ALLOY 360, 1/2H FED SPEC SINGLE MATERIAL RESPONSE |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 1/4-28 |
| Screw Thread Series Designator | UNF |
| Thread Class | 2A A |
| Material | COPPER ALLOY 360 |
| Fabrication Method | BAR STOCK, MACHINED OR ROD STOCK, MACHINED |
| Smallest Inside Diameter | 0.128 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 |
|---|---|
| 7791303 PRIMARY | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
| 7791303 | Army, United States Department of the Dba Rock Island Arsenal Jmtc (USA) |
| Reference | Meaning |
|---|---|
| 7791303 | 3/9 Design control — primary reference Springfield Armory |
| 10177038 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 7791303 | 5/9 Secondary reference General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems |
NSN 4730-00-908-3745 is a Inverted Nut,tube Coupling, manufactured by Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-908-3745 has 2 manufacturer part numbers on file: 7791303 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate), 7791303 (Army, United States Department of the Dba Rock Island Arsenal Jmtc).
Key specifications for 7791303: Width Across Flats: 0.250 INCHES NOMINAL IN; Tube Outside Diameter for Which Designed: 0.125 INCHES NOMINAL IN; Style Designator: INVERTED NUT, TUBE, DOUBLE COMPRESSION; Material Document and Classification: SAE CA360 ASSN STD SINGLE MATERIAL RESPONSE OR QQ-B-626, ALLOY 360, 1/2H FED SPEC SINGLE MATERIAL RESPONSE. 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.