The Tee,pipe to Tube, cataloged under National Stock Number 4730-01-033-5394, 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 Mcmaster-Carr Supply Co. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-033-5394 |
| Primary Part Number | 51875K74 |
| Item Name | Tee,pipe to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Connection Style | PLAIN (PIPE) THIRD END |
| Connection Style | FLARELESS (TUBE) SECOND END |
| Connection Style | FLARELESS (TUBE) FIRST END |
| Connection Type | THREADED EXTERNAL PIPE THIRD END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Nominal Outside Diameter Tube Accommodated | 0.375 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 0.375 INCHES FIRST END IN |
| Leg Length | 1.062 INCHES NOMINAL ALL ENDS IN |
| Nominal Thread Size | 0.562 INCHES SECOND END IN |
| Nominal Thread Size | 0.125 INCHES THIRD END IN |
| Nominal Thread Size | 0.562 INCHES FIRST END IN |
| Seat Angle | 12.0 DEGREES SECOND END |
| Seat Angle | 12.0 DEGREES FIRST END |
| Thread Class | 2A SECOND END A |
| Thread Class | 2A FIRST END A |
| Material | COPPER ALLOY OVERALL |
| Thread Series Designator | NPT THIRD END |
| Thread Series Designator | UNEF FIRST END |
| Thread Series Designator | UNEF 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 |
|---|---|
| 51875K74 | Mcmaster-Carr Supply Co (USA) |
| 3149257 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| 563624 | Lockheed Martin Corporation Div Rms (USA) |
| Reference | Meaning |
|---|---|
| 563624 | 5/9 Secondary reference Lockheed Martin Corporation Div Rms - Mitchel Field |
| 7203578 | 7/2 Vendor item drawing reference U.S. Government activity |
| 272-P-3/8X1/8 | 3/9 Design control — primary reference Imperial |
| 272P6-2 | 5/9 Secondary reference Imperial |
NSN 4730-01-033-5394 is a Tee,pipe to Tube, manufactured by Mcmaster-Carr Supply Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-033-5394 has 3 manufacturer part numbers on file: 51875K74 (Mcmaster-Carr Supply Co), 3149257 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 563624 (Lockheed Martin Corporation Div Rms).
Key specifications for 51875K74: Connection Style: PLAIN (PIPE) THIRD END; Connection Style: FLARELESS (TUBE) SECOND END; Connection Style: FLARELESS (TUBE) FIRST END; Connection Type: THREADED EXTERNAL PIPE THIRD 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.