Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AA56B found under Strainer Oil by Gast Mfg Corp. The National Stock Number assigned to this part is 4310000035646, 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 AA56B.