The Tee,pipe to Tube, cataloged under National Stock Number 4730-00-411-5571, 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 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 22 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-411-5571 |
| Primary Part Number | 1655792-9 |
| Item Name | Tee,pipe to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Furnished Items and Quantity | 2 PREFORMED PACKING AND 2 SHORT COUPLING NUT |
| Connection Style | PLAIN (PIPE) THIRD ENDPLAIN (PIPE) THIRD END |
| Connection Style | GASKET SEAL, COMPRESSION (TUBE) FIRST ENDGASKET SEAL, COMPRESSION (TUBE) FIRST END |
| Connection Style | GASKET SEAL, COMPRESSION (TUBE) SECOND ENDGASKET SEAL, COMPRESSION (TUBE) SECOND END |
| Connection Type | THREADED EXTERNAL TUBE SECOND ENDTHREADED EXTERNAL TUBE SECOND END |
| Connection Type | THREADED EXTERNAL TUBE FIRST ENDTHREADED EXTERNAL TUBE FIRST END |
| Connection Type | THREADED EXTERNAL PIPE THIRD ENDTHREADED EXTERNAL PIPE THIRD END |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES ALL ENDS IN |
| Operating Pressure | 2500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Leg Length | 1.000 INCHES NOMINAL FIRST END1.000 INCHES NOMINAL FIRST END IN |
| Leg Length | 1.156 INCHES NOMINAL THIRD END1.156 INCHES NOMINAL THIRD END IN |
| Nominal Thread Size | 0.875 INCHES FIRST END0.875 INCHES FIRST END IN |
| Nominal Thread Size | 0.875 INCHES SECOND END0.875 INCHES SECOND END IN |
| Nominal Thread Size | 0.250 INCHES THIRD END0.250 INCHES THIRD END IN |
| Maximum Operating Temp | 135.0 CELSIUS SINGLE RESPONSE135.0 CELSIUS SINGLE RESPONSE DEGC |
| Surface Treatment | CADMIUM OUTSIDE |
| Surface Treatment | CADMIUM OUTSIDECADMIUM INSIDE |
| Thread Class | 2A ALL ENDS2A ALL ENDS A |
| Material | STEEL OVERALL |
| Thread Series Designator | NPTF THIRD END |
| Thread Series Designator | UNF SECOND ENDUNF FIRST END |
| Thread Series Designator | NPTF THIRD ENDUNF 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 |
|---|---|
| 1655792-9 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 600-8-8-4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-00-411-5571 is a Tee,pipe to Tube, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-411-5571 has 1 manufacturer part number on file: 1655792-9 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
3 possible matches (shared part number, not a government interchangeability claim): 6760-01-029-0000, 6545-01-607-5709, 2640-01-693-4705. Verify interchangeability with system specifications before substitution.
Key specifications for 1655792-9: Furnished Items and Quantity: 2 PREFORMED PACKING AND 2 SHORT COUPLING NUT; Connection Style: PLAIN (PIPE) THIRD ENDPLAIN (PIPE) THIRD END; Connection Style: GASKET SEAL, COMPRESSION (TUBE) FIRST ENDGASKET SEAL, COMPRESSION (TUBE) FIRST END; Connection Style: GASKET SEAL, COMPRESSION (TUBE) SECOND ENDGASKET SEAL, COMPRESSION (TUBE) SECOND END. 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.