fittings › boss reducers
AN919-4J
Aeronautical Standard Boss Reducer
Description
Reducer
Specifications
| Alternate Item Number | AS5174J0602 |
|---|---|
| Connection Style | Flared w/ gasket seal (boss) all ends |
| Connection Type | Flare Type, Threaded external boss all ends |
| Dimension E | 0.813 in |
| Dimension S | 5/8 in |
| Dimension W | 1 19/64 in |
| End Application | Aircraft application |
| Flare Angle | 37 º |
| Industry Standards/Certification | AN919 |
| Material | CRES |
| Material Specification | 66 federal standard single material response |
| NIIN | 00-585-6556 |
| NSN | 4730-00-585-6556 |
| Nominallength | 1.297 |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Mil-s-5002 military specification single treatment response inside, Type 2 military specification single treatment response outside e300 mil-f-14072 |
| Thread Class | 3a all ends |
| Thread Series | UNF |
| Thread Series Designator | Unf (fine thread) 1st end, Unf (fine thread) 2nd end |
| Thread Size | 0.312 inches 2nd end, 0.562 inches 1st end |
| Thread T (Large End (Reference)) | 9/16-18 |
| Thread T (Small End (Reference)) | 5/16-24 |
| Tube Outside Diameter (Large End) | 3/8 in |
| Tube Outside Diameter (Small End) | 1/8 in |
| Weight | 0.065 lb |
Cross-reference
No interchangeable or dimensionally similar parts are on record for AN919-4J. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error