Set screw Holding screw Grub screw Standard: ISO, DIN, ANSI/ASME, BS, JIS, AS. Dia.:M2.5~M36; 3# ~ 1 1/2"(Big size adopt hot forged technics forming,then thread rolling) Length: no limit Drive types: hexagon socket(allen),torx star, square, slotted, philips, bristol spline, etc. Point types: flat, cup, cone, knurling cup, dog & oval, etc. Material: carbon steel, stainless steel, alloy steel, brass, aluminium,etc. Class/Grade: class8.8,10.9,12.9; grade5, 8; A2-70,A4-80,ASTM F912,ASTM F880,etc. Surface treatment: passivation, black oxygenation, zinc plated, nickel plated.etc.