Ụlọ ọrụ ihe nkedo nke China na-ebunye akpa maka nnukwu ike hex bolts, eri eri, stud bolt ZYL ika dị elu hexagon bolts DIN931 DIN933, sọket kposara DIN912, flange bolts din6921 DIN912 hex soket kposara, Allen bolts M10 M12 M16 M20 M24 M27 oyi adịgboroja igwe Hex bolts mmepụta China fastener, hex bolts ISO4014/4017 Bolts, aku, stud Bolts Kedu ka esi emepụta A193 B7?
