Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CH442CW-6 found under Vacuum Pump Rotary by Port Inc. The National Stock Number assigned to this part is 4310014989436, 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 CH442CW-6.