Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F73 27 found under Ring Wearing by Rolls Royce Marine A S Dep. The National Stock Number assigned to this part is 4320013036402, and the Federal Supply Class is 4320 Power And Hand Pumps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like F73 27.