FORTUNE BRIGHT always takes"SATIFY CUSTOMERS" as quality policy and "CUSTOMERS' SATISFACTION, ON TIME DELIVERY" as quality goa l. Our products cover hexagon head(DIN980M), cap, flange nut(DIN6927) and some special specifications: materials include low carbon steel, me dium carbon steel, stainless steel. U-NUT with metal insertion are prima rily exported to JAPAN, KOREA, AMERICA, EUROPE, and TAIWAN domes tic market. For more informaion regarding SELF-LOCKING NUT, please contact wit h us.