Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MS9013 12 found under Ring Retaining by Feinmechanische Werke Mainz Gmbh. The National Stock Number assigned to this part is 5325002856716, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MS9013 12.