These bolts are very uncommon different kind of raw material used for the manufacturing i.e. Carbon steel, Alloys steel, Stainless Steel, or brass.
Range : 3/8" to 3" or M 10 to M 72 in dia
These are very common assemblies for Automobile Industries. These are of different shapes as per requirement & can be of higher strength of different grade, passivated or painted as per requirement.
Range : 1/2" to 1-1/2" or M 12 to M40 in diameter
Coach screws, U-clamp bolt, Hook bolt, Carriage bolt, Foundation bolt, Eye bolt, Hook screw with nut or without nut Specifications : DIN, JIS, BS, IS, ISO, IFI or as per drawings. Range : M 3 to M 24 or 1/8" to 1" Finish : Electro galvanised, Hot dip galvanised, Zinc plated with yellow chrome passivated, Black oxide & Tin plated