Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KAS900B1 4 found under Knob by Chicago Dryer Co. The National Stock Number assigned to this part is 5355016211378, 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 KAS900B1 4.