Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 773-0020 found under Fan Ventilating by Drs Rugged Systems Europe Ltd. The National Stock Number assigned to this part is 4140014605067, and the Federal Supply Class is 4140 Fans Air Circulators And Blower Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 773-0020.