We support customized and can also manufacture non-standard fasteners according to your drawings. Series Half Thread (Partial Thread) , Full Thread. Standard DIN, ASTM/ANSI, JIS, ISO, GB and so on. Metric Dia M5 - M16 & Lengths 10mm - 140mm Threads Metric Coarse & Fine Strength Property Class 4.8, 8.8, 10.9, 12.9 Material Q195, 35K, 10B21,40Cr, 35CrMo Surface Treatment Plain, Zinc Plated & Zinc Yellow, Blackening, Ni Plated Application Their primary use is for heavy-duty fixing and fastening applications. This could include: Within construction projects，during the erection, repair, and maintenance of buildings, bridges, and road infrastructure, machinery assemblies, woodworking tasks such as fastening frames, engineering applications, vehicle and automotive.https://www.hollowrivet.com/product/bolts/hex-head-bolts/