The Hillman Group 2647 6-20 x 1/2-Inch Self Drilling Phillips Pan Head Screw, 30-Pack Contains a slightly rounded head with short vertical sides and a lower profile than similar round styles Drill point requires no pilot hole Fasten with a Phillips head screwdriver to reduce the risk of over-tightening to protect the screw and fastened material Protrudes above the fastened material for easy installation and removal