... various of standard and non-standard fasteners (bolts, nuts, screws, etc) 1. material:carbon steel 2. standard:GB/DIN/ANSI.etc various of standard and non-standard fasteners (bolts ... M2-M683.Standards:DIN ,ANSI/ASME,BS,GB,JIS,Non-standard,JB/T4.Surface:plain,zinc plated,black oxide,hot ... Saudi Arabia,Europe,South Korea,Southeast various of standard and non-standard fasteners (bolts, nuts, screws, etc)