Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RA123GS found under Compressor Centrifugal by Snap On Tools Corp. The National Stock Number assigned to this part is 4310013219842, 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 RA123GS.