non-standard flat head socket rivets with internal thread 1. standard: non-standard. 2. material: ... zinc non-standard flat head socket rivets with internal thread1.Standards:DIN ,ANSI/ASME,BS,GB,JIS ... 10.9 and 12.9.5. Stainless steel internal and external hexagon bolt products: A2-70, A4 ... 80. Material: 304, 316, 316L.6. International internal and external hexagon bolt with the mechanical property of ...