... standard. 2. material: steel, 3. finish: zinc non-standard flat head socket rivets with internal thread1.Standards:DIN ,ANSI/ASME,BS ... ,Southeast Asia ,etc.Professional production and processing: nut, nuts, pin shaft, stud bolt,screws, bolts, non-standard bolt, non ... , non-standard screws, egg neck bolt, fishbolt, countersunk head bolt. Expansion bolt, expansion screw.etc.Specialized in manufacturing ...