The Coupling,tube, cataloged under National Stock Number 4730-01-028-0989, 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 22 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-028-0989 |
| Item Name | Coupling,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Connection Style | STREAMLINED W/ ONE BRAZING RING (TUBE) ALL ENDS |
| Tubing Wall Nominal Thickness for Which Designed | 0.380 INCHES ALL ENDS IN |
| Nominal Overall Length | 5.750 INCHES IN |
| Connection Type | UNTHREADED INTERNAL TUBE ALL ENDS |
| Style Designator | PLAIN |
| Material Document and Classification | QQ-C-390,TYPE 1 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 8.625 INCHES ALL ENDS IN |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Operating Pressure | 250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Operating Pressure | 250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FOURTH RESPONSE LBS |
| Operating Pressure | 250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM THIRD RESPONSE LBS |
| Departure From Cited Designator | W/O PREINSERTED RINGS |
| Maximum Operating Temp | 425.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Maximum Operating Temp | 176.0 FAHRENHEIT FOURTH RESPONSE DEGF |
| Maximum Operating Temp | 176.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Maximum Operating Temp | 176.0 FAHRENHEIT THIRD RESPONSE DEGF |
| Nondefinitive Spec/std Data | B TYPE |
| Media for Which Designed | WATER FOURTH RESPONSE |
| Media for Which Designed | OIL THIRD RESPONSE |
| Media for Which Designed | AIR SECOND RESPONSE |
| Media for Which Designed | STEAM FIRST RESPONSE |
| Material | COPPER ALLOY OVERALL |
| 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 |
|---|---|
| N1183/3-15A | 5/9 Secondary reference U.S. Government activity |
| M1183/3-15A | 2/2 Government specification standardization U.S. Government activity |
| MIL-DTL-1183/3 | 4/1 Identification reference U.S. Government activity |
| S-3-36ALT4-8 | 5/1 Secondary reference U.S. Government activity |
| S-3-36ALT4 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-028-0989 is a Coupling,tube, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-028-0989: Connection Style: STREAMLINED W/ ONE BRAZING RING (TUBE) ALL ENDS; Tubing Wall Nominal Thickness for Which Designed: 0.380 INCHES ALL ENDS IN; Nominal Overall Length: 5.750 INCHES IN; Connection Type: UNTHREADED INTERNAL TUBE ALL ENDS. 22 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.