Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2A4000(020037 found under Switch Rotary by Rotron Incorporated. The National Stock Number assigned to this part is 5930013980476, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2A4000(020037.