Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HYVAC 45 found under Vacuum Pump Unit Rotary by Boekel Scientific. The National Stock Number assigned to this part is 4310010226001, 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 HYVAC 45.