Abstract: In a system and method for adjusting a height of a base of a clamp to fit to strips of a plurality of IC (integrated circuit) package sizes, the clamp is comprised of a fixed clamp portion and the base having a height that is adjustable with respect to the fixed clamp portion. A bar is disposed over the base of the clamp along a length of the base of the clamp, and the bar is fixed with respect to the fixed clamp portion. Each of a plurality of dummy strips of IC packages corresponds to a respective IC package size. A respective dummy strip of IC packages corresponding to a respective IC package size is placed on the base of the clamp to be supported by the base of the clamp. In addition, a plurality of height adjustment jigs are disposed on the bar to slide along the bar. Each of the height adjustment jigs has a respective size corresponding to a strip of a respective IC package size.

Abstract: A locking screw mechanism includes an improved screw nut for minimizing the force required for loosening the locking screw mechanism when an object is clamped therein. A locking screw mechanism includes a screw head disposed on a screw shaft and a screw nut threaded about the screw shaft. The screw nut includes a back screw nut threaded about the screw shaft. The back screw nut has a nut holding portion and a contact ring surface. The screw nut also includes a front screw nut disposed around the nut holding portion of the back screw nut. The front screw nut is disposed toward the object that is being clamped. The screw nut further includes a holding ring disposed around the nut holding portion of the back screw nut for holding the front screw nut to the back screw nut. The contact ring surface of the back screw nut turns against the front screw nut to press the front screw nut against the object when the back screw nut is threaded toward the object.