The Coupling,tube, cataloged under National Stock Number 4730-01-373-2701, 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 16 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-373-2701 |
| Item Name | Coupling,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Surface Treatment Document and Classification | AMS2486 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Connection Style | PLAIN (TUBE) FIRST END |
| Connection Style | FLARELESS (TUBE) SECOND END |
| Nominal Overall Length | 1.278 INCHES IN |
| Connection Type | UNTHREADED INTERNAL TUBE FIRST END |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Style Designator | THREADED AND PLAIN |
| Material Document and Classification | AMS4965 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES ALL ENDS IN |
| Nominal Thread Size | 0.438 INCHES SECOND END IN |
| Seat Angle | 12.0 DEGREES SECOND END |
| Maximum Operating Temp | 275.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Surface Treatment | PHOSPHATE FLUORIDE OVERALL |
| Thread Class | 3A SECOND END A |
| Material | TITANIUM ALLOY UNS R54520 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) SECOND END |
| 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 |
|---|---|
| 4PHS117-4 | 5/9 Secondary reference Te Connectivity Corporation Dba Raychem Product Division |
| AAC4117-04 | C/1 Advisory reference — outside the item-of-supply concept Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply |
| 7D0032 | D/9 Drawing number reference only U.S. Government activity |
| 7D0032T04 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-373-2701 is a Coupling,tube, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4730-01-373-2702. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-373-2701: Surface Treatment Document and Classification: AMS2486 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Connection Style: PLAIN (TUBE) FIRST END; Connection Style: FLARELESS (TUBE) SECOND END; Nominal Overall Length: 1.278 INCHES IN. 16 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.