... 3. finish: zinc non-standard flat head socket rivets with internal thread1.Standards:DIN ,ANSI/ASME,BS,GB ... JIS,Non-standard2.Metail:Carbon steel,stainless steel,alloy steel.3.class:4.8,8.8, ... bolts,screws,studs,nuts,washers,threaded Rods,pins,rivets,stamping,circlips and other nonstandard parts.Shanghai ... include the following 7 types:1. High strength alloy steel double end stud- , fully-threaded stud ...