Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D666038XBM666038 found under Vacuum Pump Unit Rotary by Union Carbide Corp. The National Stock Number assigned to this part is 4310007081356, and the Federal Supply Class is 4310 Compressors And Vacuum Pumps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D666038XBM666038.