The Reducer,tube, cataloged under National Stock Number 4730-01-373-2704, 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 Aerofit, Llc. Government technical data includes 20 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-373-2704 |
| Primary Part Number | 4PHS116-1012 |
| Item Name | Reducer,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Aerofit, Llc |
| Status | ACTIVE |
| Connection Style | PLAIN (TUBE) FIRST END |
| Connection Style | FLARELESS (TUBE) SECOND END |
| Nominal Overall Length | 2.753 INCHES IN |
| Connection Type | UNTHREADED INTERNAL TUBE FIRST END |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Material Document and Classification | AMS4965 4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL V |
| Nominal Outside Diameter Tube Accommodated | 0.625 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 0.750 INCHES FIRST END IN |
| Nominal Thread Size | 1.062 INCHES FIRST END IN |
| Nominal Thread Size | 0.875 INCHES SECOND END BULKHEAD IN |
| Nominal Thread Size | 0.875 INCHES SECOND END IN |
| Seat Angle | 12.0 DEGREES SECOND END |
| Thread Class | 3A SECOND END BULKHEAD A |
| Thread Class | 3A SECOND END A |
| Thread Quantity Per Inch | 12 FIRST END |
| Material | TITANIUM ALLOY UNS R54520 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) SECOND END BULKHEAD |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) SECOND END |
| Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) FIRST END |
| Reducer Type | CONCENTRIC |
| 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 |
|---|---|
| 4PHS116-1012 PRIMARY | Aerofit, Llc (USA) |
| Reference | Meaning |
|---|---|
| 4PHS116-1012 | 5/9 Secondary reference Advanced Metal Components Inc |
| 921378 | 5/9 Secondary reference Advanced Metal Components Inc |
| 4PHS116-1012 | 5/9 Secondary reference Te Connectivity Corporation Dba Raychem Product Division |
NSN 4730-01-373-2704 is a Reducer,tube, manufactured by Aerofit, Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-373-2704 has 1 manufacturer part number on file: 4PHS116-1012 (Aerofit, Llc).
3 possible matches (shared part number, not a government interchangeability claim): 4730-01-373-3105, 4730-01-373-5624, 4730-01-373-5628. Verify interchangeability with system specifications before substitution.
Key specifications for 4PHS116-1012: Connection Style: PLAIN (TUBE) FIRST END; Connection Style: FLARELESS (TUBE) SECOND END; Nominal Overall Length: 2.753 INCHES IN; Connection Type: UNTHREADED INTERNAL TUBE FIRST END. 20 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.