Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 737-012-004 found under Switch Rotary by Parker Hannifin Ltd. The National Stock Number assigned to this part is 5930010781315, 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 737-012-004.