1108
RACO 1108 Bushing,Iron,Overall L 2 23/32in 52AV83
You will find the MOS2 3-4 ยต Fisher (15-30 Microtrac) works well in vacuum environments.
Closer Door 1094 Hydraulic Concealed Mount for Thermalrite 1108
A nice touch on the WR-A212 (SA) is the labeled fuse holder for quick swaps.