The Tee,pipe, cataloged under National Stock Number 4730-00-245-7749, 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 Flagg Stanley G & Co Inc Dba Flagg Brass. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-245-7749 |
| Primary Part Number | 4121-180 |
| Item Name | Tee,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Flagg Stanley G & Co Inc Dba Flagg Brass |
| Status | ACTIVE |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Material Document and Classification | ASTM B62 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Operating Pressure | 125.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Leg Length | 1.438 INCHES NOMINAL THIRD END IN |
| Leg Length | 1.250 INCHES NOMINAL SECOND END IN |
| Leg Length | 1.438 INCHES NOMINAL FIRST END IN |
| Nominal Thread Size | 1.000 INCHES THIRD END IN |
| Nominal Thread Size | 0.500 INCHES SECOND END IN |
| Nominal Thread Size | 1.000 INCHES FIRST END IN |
| Specification/standard Data | 81348-WW-P-460 GOVERNMENT SPECIFICATION |
| Maximum Operating Temp | 65.6 CELSIUS SECOND RESPONSE DEGC |
| Maximum Operating Temp | 204.0 CELSIUS FIRST RESPONSE DEGC |
| Nondefinitive Spec/std Data | A CLASS |
| Media for Which Designed | WATER-OIL-GAS SECOND RESPONSE |
| Media for Which Designed | STEAM FIRST RESPONSE |
| Material | COPPER ALLOY 836 OVERALL |
| Thread Series Designator | NPT ALL ENDS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4730-00-245-7749 is a Tee,pipe, manufactured by Flagg Stanley G & Co Inc Dba Flagg Brass, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-245-7749 has 2 manufacturer part numbers on file: 250571 (Mechanical Equipment Company, Inc. Dba Mechanical Equipment Co Inc), 4121-180 (Flagg Stanley G & Co Inc Dba Flagg Brass).
1 possible match (shared part number, not a government interchangeability claim): 5950-01-041-6535. Verify interchangeability with system specifications before substitution.
Key specifications for 4121-180: Connection Style: PLAIN (PIPE) ALL ENDS; Connection Type: THREADED INTERNAL PIPE ALL ENDS; Material Document and Classification: ASTM B62 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Operating Pressure: 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS. 19 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.