titanium screw standard:DIN 933,DIN 912,DIN 934,DIN 7991 GB/T 3908,GB 5780--5782,GB 5788,GB 6178 Specific information :1,Standard : ASTM , AMS , DIN2,Material : Gr 1 , Gr 2 , Gr 3 , Gr 4 , Gr 5 , Gr 7 , Gr 9 , Gr 12 ,TA 1 , TA 2 , TA3 ,TC 4 .3, Technical standard : Ti ≥ 99.5 % 4,Craft : Special unique processing technology .5,Application : Chemical industry , aerospace , spaceflight , surgical ...