Patent ID: 7639502

Claim:
A fastening element comprising: a head comprising a cap and two legs extending downwardly from the cap, each of the two legs forming a hook at a free end thereof; a connecting member connected with the head and comprising at least two blocks and a fixing portion below the at least two blocks, the connecting member, the at least two blocks and the fixing portion being integrally formed as a monolithic piece, a top end of the connecting member defining two opposite grooves therein and comprising two bulges in the two grooves, the connecting member defining an indent below each of the bulges; and a resilient member disposed around the connecting member and between the cap of the head and the at least two blocks of the connecting member, wherein the at least two blocks are used for engaging with a bottom face of a heat sink after the connecting member is extended downwardly through the heat sink and turned with a certain degree whereby the head, the connecting member and the resilient member are secured to the heat sink; wherein the two legs of the head are respectively received in the two grooves of the connecting member, the hooks of the head are respectively received in the indents of the connecting member and engaged with the bulges of the connecting member, whereby the head is fixedly secured to the connecting member.