These Smooth Head Torx (or Star Drive) Shoulder Screws offer another variant on the standard socket range. They have a 6 lobe drive that is easier to install than standard socket or slotted drive products. All our Smooth head shoulder screws have tighter shoulder diameter and shoulder length tolerances than knurled head screws making them ideal for use with ball bearings and other precision components. These popular shoulder screw sizes do not meet any specific governing body standard but are accepted sizes and dimensions in today's market place.
INCH tolerances on the shoulder diameter are: plus zero to minus one thousandths of an inch (+0.000" to -0.001"). The shoulder length tolerance is +0.002" to -0.00". Class 2A thread fit.