... according to customer requirement 3 ISO9001.2000 certifiction Product name : Non-standard screw ( bolt nut )Size : M3-M16 Length: 10mm - 180mmMaterial ... requirementStandard : GB , ANSI . DIN , ISO ,BSW , JIS , special standard according to customer drawingsGrade : 4.8/8.8/10.9 ... to specialize in producing various kinds of Special bolts , Non-standard bolts and DIY BOLT . Welcome to visit our company ...