(1) The following material production process round cylindrical drill roughing finishing Bottom Bottom peel - Cone buckle (buckle milling) rust treatment testing, packaging (2) sleeve introduced three series: Standard ( steel connection under normal circumstances), reverse threaded type (for both ends of the steel can not turn the occasion), reducers type (for different diameter steel connections) (connection diagram) Raw materials: 45 # quality carbon structural Steel, which is in line with the relevant provisions of the steel JGJ107 the current national standard and high dimensional accuracy, reliable quality. Size: 14mm-40mm rebar apply: You can connect Φ14-Φ40mm diameter range HRB335 grade, HRB400 grade, RRB400 ribbed steel grade performance: the State Construction Engineering Quality Supervision and Testing Center, to JGJ107-2003 Intermediate connector www.chinataotong.com