We are offering brass bolts. Material: in case of turned machine bolts. Free cutting brass is 319 type ( I ) or free cutting brass as per bs 249 type ( I ) or high grade free cutting brass any special brass material composition as per customers requirement. In case of cold forged machine bolts. Brass as per is 4413 or bs 2874cz108 or high grade mild steel in case cold forged machine 130ms length size: as per custom designs or requirements threads: iso metric (mm threads) ba threads bsw threads (inches) unc & unf threads any threads as per custom design. finish and coating: natural, nickel plated, tin plated or any coating as per customer specification.