Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 555 074 02 85 found under Retainer Helical Co by Detroit Diesel Corporation. The National Stock Number assigned to this part is 5340014384507, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 555 074 02 85.