Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 508-1103-20 found under Knob by Gw Technologies Pty Ltd. The National Stock Number assigned to this part is 5355002844569, and the Federal Supply Class is 5355 Knobs And Pointers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 508-1103-20.