SS Oval Hd Phillips Machine Screw 1/4" - 20 x 1 1/4"Sold in sets of 100 Countersunk designs consist primarily of flat, oval, and bugle heads. Unless the material is very soft, flat and oval heads require a countersunk hole. The advantage is that little or no part of the head protrudes above the surface of the material. Raised heads, sometimes known as oval shaped heads, have an angle much like flat screws but have more of a dome shaped head. Youll also need to countersink these screws to accommodate