This is the switch shaft seal parts that I used for the camara tilting mechanism as it passes threw the front bulkhead,tecknick saft adapter and good ca make the connection very strong !The stainless shaft is under 2mm and fits snugly into the tecknick adapter.

The threaded part was cut down so that it fits with the arm when the bulkhead is installed.Arms are reused or get new ones.

These parts can be used for many aplications for other subs,examples are servo rod passthrew,rotating switch,masts operation radar ecetra,shaft drives,electrical yes when used in tandem and switched off while in water.??Seals are simitar industrial grade and are available in sets!nice parts and cheap.