non-standard flat head socket rivets with internal thread 1. standard: non-standard. 2. material: steel, 3. finish: zinc ... ,South Korea,Southeast Asia ,etc.Professional production and processing: nut, nuts, pin shaft, stud bolt,screws, bolts, non-standard bolt, ... etc.Specialized in manufacturing fasteners such as bolts,screws,studs,nuts,washers,threaded Rods,pins,rivets,stamping,circlips and other ...