... internal thread 1. standard: non-standard. 2. material: steel, 3. finish: zinc non-standard flat head socket rivets with internal ... thread1.Standards:DIN ,ANSI/ASME,BS,GB,JIS,Non-standard2.Metail: ... nuts, pin shaft, stud bolt,screws, bolts, non-standard bolt, non-standard nut, non-standard screws, egg neck bolt, fishbolt, countersunk ...