The Tee,boss, cataloged under National Stock Number 4730-01-290-1552, 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 11 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-290-1552 |
| Primary Part Number | 7M637DH-D12 |
| Item Name | Tee,boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Flow Angle | 90.0 DEGREES |
| Surface Treatment Document and Classification | MIL-C-83488,CL 3,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Connection Style | GASKET SEAL (BOSS) ALL ENDS |
| Connection Type | THREADED INTERNAL BOSS ALL ENDS |
| Leg Length | 1.359 INCHES NOMINAL ALL ENDS IN |
| Nominal Thread Size | 1.062 INCHES ALL ENDS IN |
| Surface Treatment | ALUMINUM OVERALL |
| Thread Class | 3B ALL ENDS |
| Thread Quantity Per Inch | 12 ALL ENDS |
| Material | ALUMINUM ALLOY OVERALL |
| Thread Series Designator | UN 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 |
|---|---|
| 7M637DH-D12 | Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply (USA) |
| 7M637DH-D12 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 7M637DH-D12 | C/1 Advisory reference — outside the item-of-supply concept Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company |
| 10109023 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 7M637DH-D12 | C/1 Advisory reference — outside the item-of-supply concept Faber Enterprises, Inc. Div Faber Enterprise Inc |
| 7M637DH-D12 | C/1 Advisory reference — outside the item-of-supply concept Nelson Aero Space, Inc. |
| 7M637DH-D12 | C/1 Advisory reference — outside the item-of-supply concept Sps Technologies, Llc Dba Airdrome Precision Components |
NSN 4730-01-290-1552 is a Tee,boss, manufactured by The Boeing Company Div Defense, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-290-1552 has 2 manufacturer part numbers on file: 7M637DH-D12 (Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply), 7M637DH-D12 (The Boeing Company Div Defense).
Key specifications for 7M637DH-D12: Flow Angle: 90.0 DEGREES; Surface Treatment Document and Classification: MIL-C-83488,CL 3,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Connection Style: GASKET SEAL (BOSS) ALL ENDS; Connection Type: THREADED INTERNAL BOSS ALL ENDS. 11 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.