The Tee,tube, cataloged under National Stock Number 4730-01-078-1660, 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 The Boeing Company Div Defense. Government technical data includes 27 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 9 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-078-1660 |
| Primary Part Number | 7M151DA4 |
| Item Name | Tee,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 2,CLASS 2 MIL SPEC 1ST TREATMENT RESPONSE BODY |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 2,CLASS 2 MIL SPEC 1ST TREATMENT RESPONSE NUT |
| Connection Style | FLARED (TUBE) SECOND END |
| Connection Style | SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END |
| Connection Style | FLARED (TUBE) THIRD END |
| Connection Type | THREADED EXTERNAL TUBE THIRD END |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Connection Type | THREADED INTERNAL TUBE FIRST END |
| Material Document and Classification | QQ-A-367,T6 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-A-225/6,T6 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-225/6,T851 FED SPEC SINGLE MATERIAL RESPONSE NUT |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES ALL ENDS IN |
| Operating Pressure | 500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Leg Length | 0.891 INCHES NOMINAL THIRD END IN |
| Leg Length | 0.600 INCHES NOMINAL FIRST END IN |
| Leg Length | 0.891 INCHES NOMINAL SECOND END IN |
| Nominal Thread Size | 0.438 INCHES ALL ENDS IN |
| Seat Angle | 37.0 DEGREES ALL ENDS |
| Maximum Operating Temp | 360.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Surface Treatment | ANODIZE NUT |
| Surface Treatment | ANODIZE BODY |
| Media for Which Designed | FLUID SINGLE RESPONSE |
| Thread Class | 2A SECOND END A |
| Thread Class | 2A THIRD END A |
| Thread Class | 2B FIRST END |
| Material | ALUMINUM ALLOY 2024 NUT |
| Material | ALUMINUM ALLOY 2014 BODY |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) 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 |
| Part Number | Manufacturer |
|---|---|
| 7M151DA4 | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| 7M151DA4 | Nelson Aero Space, Inc. (USA) |
| 7M151DA4 | Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply (USA) |
| 7M151DA4 PRIMARY | The Boeing Company Div Defense (USA) |
| 7M151DA4 | Sps Technologies, Llc Dba Airdrome Precision Components (USA) |
| Reference | Meaning |
|---|---|
| 7M151DA4 | 5/9 Secondary reference Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company |
| 7M151 | D/9 Drawing number reference only The Boeing Company Div Defense |
| 7M151DA4 | 5/9 Secondary reference Faber Enterprises, Inc. Div Faber Enterprise Inc |
NSN 4730-01-078-1660 is a Tee,tube, manufactured by The Boeing Company Div Defense, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-078-1660 has 5 manufacturer part numbers on file: 7M151DA4 (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems), 7M151DA4 (Nelson Aero Space, Inc.), 7M151DA4 (Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply), 7M151DA4 (The Boeing Company Div Defense), 7M151DA4 (Sps Technologies, Llc Dba Airdrome Precision Components).
9 possible matches (shared part number, not a government interchangeability claim): 4730-01-088-3476, 4730-01-156-8267, 4730-01-161-1226. Verify interchangeability with system specifications before substitution.
Key specifications for 7M151DA4: Surface Treatment Document and Classification: MIL-A-8625,TYPE 2,CLASS 2 MIL SPEC 1ST TREATMENT RESPONSE BODY; Surface Treatment Document and Classification: MIL-A-8625,TYPE 2,CLASS 2 MIL SPEC 1ST TREATMENT RESPONSE NUT; Connection Style: FLARED (TUBE) SECOND END; Connection Style: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END. 27 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.