The Tee,pipe, cataloged under National Stock Number 4730-01-309-3390, 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 Mueller Brass Co.. Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-309-3390 |
| Primary Part Number | W-4079 |
| Item Name | Tee,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Mueller Brass Co. |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 1.375 INCHES FIRST END IN |
| Nominal Pipe Size Accommodated | 0.875 INCHES SECOND END IN |
| Nominal Pipe Size Accommodated | 1.125 INCHES THIRD END IN |
| Connection Style | PLAIN (PIPE) THIRD END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Style | PLAIN (PIPE) SECOND END |
| Connection Type | UNTHREADED EXTERNAL PIPE SECOND END |
| Connection Type | UNTHREADED EXTERNAL PIPE FIRST END |
| Connection Type | UNTHREADED EXTERNAL PIPE THIRD END |
| 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 |
| Part Number | Manufacturer |
|---|---|
| W-4079 PRIMARY | Mueller Brass Co. (USA) |
| Reference | Meaning |
|---|---|
| 1603AS649 | 7/1 Vendor item drawing reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| 1603AS649-9 | 7/2 Vendor item drawing reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
NSN 4730-01-309-3390 is a Tee,pipe, manufactured by Mueller Brass Co., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-309-3390 has 1 manufacturer part number on file: W-4079 (Mueller Brass Co.).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-309-3391. Verify interchangeability with system specifications before substitution.
Key specifications for W-4079: Nominal Pipe Size Accommodated: 1.375 INCHES FIRST END IN; Nominal Pipe Size Accommodated: 0.875 INCHES SECOND END IN; Nominal Pipe Size Accommodated: 1.125 INCHES THIRD END IN; Connection Style: PLAIN (PIPE) THIRD END. 10 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.