M3-M36 Name : Hexagon socket button head boltSize : M3 - M36 (1/4"--3/4" ).Length: normal - from 12 to150 for full thread; from 20 to 200 for half threadGrade: From grade 4.8 to 12.9, from grade 2 to grade10 Standard: DIN, ANSI/ASME, BSW, GB, JIS and ect.Finish : Plain, ZP, BZP,YZP, H.D.G., BO, Dacromet and etc