standard hex bolt 1)material:mild steel,45# steel,40Cr ... :4.8,8.8,10 hex bolt, hex head bolt, m16 hex head bolts, din933 hex bolt a2 stainlessCertification:ISO9001:2000High ... Standard neutral carton box fastened with palletSatisfactory Services:we can produce U bolts as per your drawing and samples ... .we can supply package by your design.Other services are consulted ...