The Tee,tube, cataloged under National Stock Number 4730-01-154-2661, 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 16 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-154-2661 |
| Primary Part Number | 7M637AX-D4 |
| 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-C-83488,CL 3,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Connection Style | FLARED (TUBE) ALL ENDS |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES ALL ENDS IN |
| Leg Length | 1.578 INCHES NOMINAL FIRST END IN |
| Leg Length | 0.890 INCHES NOMINAL SECOND END IN |
| Leg Length | 0.953 INCHES NOMINAL THIRD END IN |
| Nominal Thread Size | 0.438 INCHES FIRST END BULKHEAD IN |
| Nominal Thread Size | 0.438 INCHES ALL ENDS IN |
| Seat Angle | 37.0 DEGREES ALL ENDS |
| Surface Treatment | ALUMINUM OVERALL |
| Thread Class | 3A FIRST END BULKHEAD A |
| Thread Class | 3A ALL ENDS A |
| Material | ALUMINUM ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) FIRST END BULKHEAD |
| 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 |
|---|---|
| 7M637AX-D4 PRIMARY | The Boeing Company Div Defense (USA) |
| 7M637AX-D4 | Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply (USA) |
| 7M637AX-D4 | Nelson Aero Space, Inc. (USA) |
| 7M637AX-D4 | Sps Technologies, Llc Dba Airdrome Precision Components (USA) |
| AS1033D040404V PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| 7M637AX-D4 | 5/9 Secondary reference Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company |
| 7M637AX-D4 | 5/9 Secondary reference Faber Enterprises, Inc. Div Faber Enterprise Inc |
| 10108795 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 4730-01-154-2661 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 4730-01-154-2661 has 5 manufacturer part numbers on file: 7M637AX-D4 (The Boeing Company Div Defense), 7M637AX-D4 (Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply), 7M637AX-D4 (Nelson Aero Space, Inc.), 7M637AX-D4 (Sps Technologies, Llc Dba Airdrome Precision Components), AS1033D040404V (Sae International Dba Sae International).
Key specifications for 7M637AX-D4: Surface Treatment Document and Classification: MIL-C-83488,CL 3,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Connection Style: FLARED (TUBE) ALL ENDS; Connection Type: THREADED EXTERNAL TUBE ALL ENDS; Nominal Outside Diameter Tube Accommodated: 0.250 INCHES ALL ENDS IN. 16 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.