PKI 100, CAT I 4mm Chassis Mount Test Socket Hirschmann Test and Measurement PKI 100, CAT I 4mm nickel plated chassis mount test sockets with pole clamp and a captive insulated head , 2mm cross hole and M4 termination thread. These PKI 100 series 4mm test sockets are ideally suited for non-rotating installation in equipment chassis and switch panels with a wall thickness of up to 3.5mm. Rated voltage 30 VAC/ 60 VDC
Rated Current 35A
CAT I
M4 Threaded termination