There's a substantial amount of concept with regard to the thread of screws which we will not go into to listed here, but yow will discover a superb in depth description listed here on Wikipedia. simply because they are self-drilling, bugle screws will not have to have pilot holes. Their exceptiona

Cheese Head. A cheese head has cylindrical sides which has a flat disc best (similar to a wheel of cheese) and also a flat bearing area. These screws are a short while ago invented from the Phillips screw business. These screws supply additional security in when compared to all other screws and wil