The Adapter,straight,flange to Boss, cataloged under National Stock Number 4730-01-194-5149, 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 4 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-01-194-5149 |
| Primary Part Number | 75A550663-2003 |
| Item Name | Adapter,straight,flange to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Flange Shape | ROUND FIRST ENDROUND FIRST END |
| Furnished Items and Quantity | 1 PREFORMED PACKING1 PREFORMED PACKING |
| Flange Face Design | PLAIN FIRST ENDPLAIN FIRST END |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND ENDEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END |
| Nominal Overall Length | 2.375 INCHES2.375 INCHES IN |
| Criticality Code Justification | FEATFEAT |
| Connection Type | THREADED EXTERNAL BOSS SECOND ENDTHREADED EXTERNAL BOSS SECOND END |
| Connection Type | FLANGE FIRST ENDFLANGE FIRST END |
| Material Document and Classification | AMS6411 ASSN STD SINGLE MATERIAL RESPONSE OVERALLAMS6411 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Size | 2.500 INCHES SECOND END2.500 INCHES SECOND END IN |
| Nominal Outside Diameter | 3.750 INCHES FIRST END3.750 INCHES FIRST END IN |
| Thread Class | 3A SECOND END3A SECOND END A |
| Thread Quantity Per Inch | 12 SECOND END12 SECOND END |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) SECOND ENDUNIFIED NATIONAL JOINT (UNJ) SECOND END |
| Nominal Thickness | 0.100 INCHES FIRST END0.100 INCHES FIRST END IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 75A550663-2003 PRIMARY | The Boeing Company Div Defense (USA) |
| 75A550663-2003 | Mission Systems Davenport Inc. (USA) |
| 75A550663-2003 | Airtronics, Llc (USA) |
| 75A550663-2003 | The Boeing Company Div Services (USA) |
| Reference | Meaning |
|---|---|
| 75A550663-2003 | 5/9 Secondary reference Nmc Group, Inc. |
| 75A550663 | D/9 Drawing number reference only The Boeing Company Div Defense |
| 75A550663-2001 | 5/9 Secondary reference U.S. Government activity |
| 75A550663-2001 | 5/9 Secondary reference The Boeing Company Div Defense |
NSN 4730-01-194-5149 is a Adapter,straight,flange to Boss, manufactured by The Boeing Company Div Defense, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-194-5149 has 4 manufacturer part numbers on file: 75A550663-2003 (The Boeing Company Div Defense), 75A550663-2003 (Mission Systems Davenport Inc.), 75A550663-2003 (Airtronics, Llc), 75A550663-2003 (The Boeing Company Div Services).
Key specifications for 75A550663-2003: Flange Shape: ROUND FIRST ENDROUND FIRST END; Furnished Items and Quantity: 1 PREFORMED PACKING1 PREFORMED PACKING; Flange Face Design: PLAIN FIRST ENDPLAIN FIRST END; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND ENDEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END. 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.