The standard of hex bolt we produce are DIN933 ,DIN931,ASTM325 ASTM193,ASME B 18.2.1,Both coarse thread and fine thread ,we can produce grade 4.8 /8.8 /10.9/12.9 /A2/A4,The material we use are 1035,1045,40cr,40crmo,SS410,SS304/SS316,We can do all surface treatment as your requiremnets such as Black,zincplated，hot dip galvanized ,dacromet,we can produce size from M6-M39,length from 10mm-200mm.we can provide OEM ODM service ,we can also produce according customized requirements .
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