These were used as heatsink for power trsnsistor which were connected to pcb and the chassis to transfer head from transistor to the main chassis.
High Quality PCB Mount Transistor Mosfet Heatsink Military Part
For High Power TEC, LED, Amplifier, Transistor Aluminium Heat sink Radiator
PCB Mount Ethernet Connector ¦ J3011G21DNLT ¦ RJ45 ¦ Right Angle ¦ Reel of 75
Joblot Of High Quality Heat Sink TO220 PCB Mount Low Profile 1500 x 50mm / 27mm
Joblot 100 x Alpha A10K, B100K Ohm Dual Gang Potentiometer PCB-Mount 16mm.
23mm 3-24V Piezo Buzzer Alarm Sounder Active DC PCB Mount 3KHz 23x16mm
