hex nut standard:DIN,JIS,ANSI,ISO size:M3-M56 material:ss,brass,carbon grade:4.8,8,1 hex nutstandard:DIN,JIS,ANSI,ISOsize:M3-M56material:ss,brass,carbongrade:4.8,8,1finish:plain,black,zp, etcpackage:bulk in caton/bag/pallet or as your requirment hex nut