... We are able to produce the hexagon slotted and castle nut with stainless steel, carbon steel and any other ... material.CASTLE NUT1.material: SS316, SS304,S45C, carbon steel2.size: ... ,so the traffic is very convenient.At present,the company employs nearly 100 staff,covers land area of 4, ... exported to Japan,America,Germany,and Korea,etc. Castle Nut