Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A01 280AS found under Knob by Berkey Marketing Companies. The National Stock Number assigned to this part is 5355001359792, 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 A01 280AS.