We are offering brass dome nuts.Specification:-bs 4183 bs 57bs 3643 bs 93is 1367 1366brass dome nuts material:-in case of turned machine screw:free cutting brass is 319 type (i) orfree cutting brass as per bs 249 type (i) orhigh grade free cutting brassany special brass material composition as per customers requirementin case of cold forged machine screw: brass as per is 4413 orbs 2874cz108 orhigh grade mild steelfinish and coating available in fasteners:- natural, nickel plated, tin plated, natural brass or any coating as per customer specification. Threads:- iso metric (mm threads)ba threadsbsw threads (inches)unc, unf threadsany threads as per custom design