1. GR2 ,GR5 Titanium screw, bolt, nuts, thread rod. Standard DIN912, DIN933, DIN84, DIN85, DIN963, DIN7991, DIN6912 , DIN931, ISO7380etc. A. mini screw and nuts: M1.0 to M4 According to customers required length and DIN standard in our technical scopes. B. Usual screw and nuts: M1.0 to M24 or bigger C. Thread rod : M1.0 to M24 of length 1000mm; D. we can produce according to customers' drawings