Designation:

SI 20 T/K
GISW 20
SI 20 C 

Construction:

The articulated head is a plain bearing housed in a housing with a stem for mounting. The rod of the articulating head is attached with an internal right`s thread.

Features:

Internal thread.
Low coefficient of friction.
For use with dynamic loads.
Contains a spherical plain bearing with a steel/PTFE (Polytetrafluoroethylene also known as Teflon) contact surface combination in a Bronze or Steel outer ring. Such a combination of contact surfaces does not require maintenance and constant lubrication.