non-standard flat head socket rivets with internal thread 1. standard: non-standard. 2. material: steel, 3. finish: zinc ... , Europe,South Korea,Southeast Asia ,etc.Professional production and processing: nut, nuts, pin shaft, stud bolt,screws, bolts, non-standard ... bolt, non-standard nut, non-standard screws, egg neck bolt, fishbolt, countersunk head bolt ...