non-standard flat head socket rivets with internal thread 1. standard: ... steel, 3. finish: zinc non-standard flat head socket rivets with internal thread1.Standards:DIN ,ANSI/ASME,BS ... International internal and external hexagon bolt with the mechanical property of Grade 4.8, 8.8, ... 8.7. Various nuts, flat gaskets, spring washers, mechanical bolts, tapping screws, fibreboard screws and hexagonal wood ...