dental titanium screw Grade:Gr1,Gr2,Gr3,Gr5,Gr7,Gr9,Gr12,Gr23 1)Boltsizes:M2-M22*Length 2)Nutsizes:M2-M22 3)Washersizes:M2-M22 4)Standard:DIN,ASTM,GB,BSW,UNC,JIS DIN912,DIN931,DIN933,DIN934,DIN7991,DIN965,DIN966,ISO7380,DIN555,DIN934,DIN985,DIN9623,DIN125,DIN127,DIN69235) Grade:Gr1,Gr2,Gr3,Gr5,Gr7,Gr9,Gr12,Gr23