Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 63S0427M0020 found under Tube Metering by Danaher Controls Corp. The National Stock Number assigned to this part is 6680011084267, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 63S0427M0020.