The BOURNS part 3386F-1-504 is a resistor cermet trimmer with a resistance value of 500K ohms and a tolerance of 10%. It has a power rating of 0.5W (1/2W) and can be adjusted by turning the shaft 1 electrical turn and 1 mechanical turn. The trimmer has a pin through-hole mounting style and is packaged in a tube. It features a compact size of 9.53 x 9.53 x 4.83mm, making it suitable for various electronic applications.