Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M12-05310120230 found under Nut Self Locking Ex by Boellhoff Verbindungstechnik Gmbh. The National Stock Number assigned to this part is 5310121589378, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like M12-05310120230.