U bolt 1.Grade: from 4.8 to 12.9 ; 2. ... H.D.G.,Dacromet and etc. 3.Material : carbon steel U bolt 1. Thread:M, UNC, UNF,2. Grade: 4.8 ... Dye Blackness, Copper Yellow, etc. 4. Packing: Carton, Box, Bag, Pallet or according to your requirement.For non-standard U bolt,your drawing ... or samples will be available for us.Contact us for more details! U bolt