Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 42312D239 found under Tube Cross Over by Dutch Valley Supply Co. The National Stock Number assigned to this part is 2995012407742, and the Federal Supply Class is 2995 Miscellaneous Engine Accessories Aircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 42312D239.