Self Drilling Screws 6-20 X 1/2" - Our standard Hex Washer Self Drilling Screw.Self Drilling Screws 6-20 X 1/2" features include: Hex Washer Head Zinc Plated Dimension Measurements = Inches Order Qty of 100 = 1 Box of 100 Below is more info on our Self Drilling Screws 6-20 X 1/2"