Download the RV406 datasheet PDF.
This datasheet also includes the RV401 variant, as both parts are published together in a single manufacturer document.
ADAPTERS - ADAPTER ADATTATORI TAPPO DI RIDUZIONE M/F MALE / FEMALE REDUCING ADAPTER REDUZIER STOPFEN MIT AUSSEN/INNENGEWINDE RV321
BSP TAPPO MASCHIO MALE PLUG STOPFEN MIT AUSSENGEWINDE RV401
F F1.