Patent ID: 7896597
Filing Date: 2011-03-01
Classification: F16B,H01L,Y10T

Abstract:
1. A fastener for fastening a heat sink to a printed circuit board, the fastener comprising: a head; and a shaft extending integrally from the head, the shaft comprising a first engaging portion having outer threads machined onto an exterior thereof, a second engaging portion having outer threads machined onto an exterior thereof, and a connecting portion interconnecting the first engaging portion and the second engaging portion, the connecting portion having two cutouts extending radially inwardly from an exterior thereof, the cutouts being substantially perpendicular to a central axis of the shaft; wherein the two cutouts are adjacent to the first engaging portion and the second engaging portion respectively; wherein the two cutouts are located at two opposite sides of the connecting portion respectively; and wherein the two cutouts each have a radial length approximately equal to a radius of the connecting portion.