Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number X8840APCA1837 found under Pipe Breather by Twin Disc Incorporated. The National Stock Number assigned to this part is 4710004157932, and the Federal Supply Class is 4710 Pipe Tube And Rigid Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like X8840APCA1837.