M1 .6 x 0.35 Thread (3.5mm Hex) (1.3mm Height) Part # NH-1000-0065,M2 x 0.4 Thread (4mm Hex) (1.6mm Height) Part # NH-1000-0070,M2 .5 x 0.45 Thread (5mm Hex) (2mm Height) Part # NH-1000-0090,M3 x 0.5