The Tee,tube to Boss, cataloged under National Stock Number 4730-01-172-9107, 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 Sps Technologies, Llc Dba Airdrome Precision Components. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-172-9107 |
| Primary Part Number | 7M637AK-D4 |
| Item Name | Tee,tube to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sps Technologies, Llc Dba Airdrome Precision Components |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-83488,CL 3,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Connection Type | THREADED INTERNAL BOSS THIRD END |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES SECOND END IN |
| Leg Length | 0.750 INCHES NOMINAL THIRD END IN |
| Leg Length | 1.500 INCHES NOMINAL SECOND END IN |
| Leg Length | 1.750 INCHES NOMINAL FIRST END IN |
| Nominal Thread Size | 0.438 INCHES THIRD END IN |
| Nominal Thread Size | 0.438 INCHES SECOND END IN |
| Nominal Thread Size | 0.438 INCHES FIRST END IN |
| Seat Angle | 37.0 DEGREES FIRST END |
| Seat Angle | 37.0 DEGREES SECOND END |
| Surface Treatment | ALUMINUM OVERALL |
| Thread Class | 3A SECOND END A |
| Thread Class | 3B THIRD END |
| Material | ALUMINUM ALLOY OVERALL |
| Thread Series Designator | UNF THIRD END |
| Thread Series Designator | UNF FIRST END |
| Thread Series Designator | UNF 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 |
|---|---|
| 7M637AK-D4 PRIMARY | Sps Technologies, Llc Dba Airdrome Precision Components (USA) |
| 7M637AK-D4 PRIMARY | The Boeing Company Div Defense (USA) |
| 7M637AK-D4 PRIMARY | Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply (USA) |
| 7M637AK-D4 PRIMARY | Nelson Aero Space, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 7M637AK-D4 | 5/9 Secondary reference Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company |
| 7M637AK-D4 | C/1 Advisory reference — outside the item-of-supply concept Fratelli Tassinari Di Arrigo E Glaugo & C. Snc |
NSN 4730-01-172-9107 is a Tee,tube to Boss, manufactured by Sps Technologies, Llc Dba Airdrome Precision Components, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-172-9107 has 4 manufacturer part numbers on file: 7M637AK-D4 (Sps Technologies, Llc Dba Airdrome Precision Components), 7M637AK-D4 (The Boeing Company Div Defense), 7M637AK-D4 (Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply), 7M637AK-D4 (Nelson Aero Space, Inc.).
Key specifications for 7M637AK-D4: Surface Treatment Document and Classification: MIL-C-83488,CL 3,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Connection Type: THREADED INTERNAL BOSS THIRD END; Nominal Outside Diameter Tube Accommodated: 0.250 INCHES SECOND END IN; Leg Length: 0.750 INCHES NOMINAL THIRD END IN. 18 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.