Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number H23A423ABK found under Compressor Unit Reciprocating by Bristol Inc. The National Stock Number assigned to this part is 4310015272078, 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 H23A423ABK.