The Tee,tube to Boss, cataloged under National Stock Number 4730-00-720-4407, 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 Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 21 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-720-4407 |
| Primary Part Number | S1625-56048 |
| Item Name | Tee,tube to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Connection Style | FLARED W/ GASKET SEAL (BOSS) SECOND END |
| Connection Type | THREADED EXTERNAL TUBE THIRD END |
| Connection Type | THREADED INTERNAL BOSS FIRST END |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES THIRD END IN |
| Leg Length | 1.050 INCHES NOMINAL FIRST END IN |
| Leg Length | 0.825 INCHES NOMINAL SECOND END IN |
| Leg Length | 1.467 INCHES NOMINAL THIRD END IN |
| Reduced Passage Nominal Inside Diameter | 0.156 INCHES SECOND END IN |
| Nominal Thread Size | 0.438 INCHES SECOND END IN |
| Nominal Thread Size | 0.438 INCHES FIRST END IN |
| Nominal Thread Size | 0.437 INCHES THIRD END IN |
| Seat Angle | 37.0 DEGREES THIRD END |
| Surface Treatment | ANODIZE OVERALL |
| Thread Class | 3A SECOND END A |
| Thread Class | 3A THIRD END A |
| Thread Class | 3B FIRST END |
| Material | ALUMINUM ALLOY OVERALL |
| Thread Series Designator | UNF THIRD END |
| Thread Series Designator | UNF FIRST END |
| Thread Series Designator | UNF 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 |
| Part Number | Manufacturer |
|---|---|
| S1625-56048 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
NSN 4730-00-720-4407 is a Tee,tube to Boss, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-720-4407 has 1 manufacturer part number on file: S1625-56048 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for S1625-56048: Connection Style: FLARED W/ GASKET SEAL (BOSS) SECOND END; Connection Type: THREADED EXTERNAL TUBE THIRD END; Connection Type: THREADED INTERNAL BOSS FIRST END; Connection Type: THREADED EXTERNAL BOSS SECOND END. 21 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.