Slotted Hex Head steel&rubber washer 

The versatile and practical self-drilling screw has been in use for many years as a method for connecting materials. Since self-drilling screws do not require a pilot hole, they can rapidly and efficiently connect a variety of materials, which enhances productivity and performance.When making the decision to use a self-drilling screw, it is important to first consider the type of materials to be connected. The key factors for an efficient, operating self-drilling screw are the types of points, which include the flute, length. Self Drilling Screw SELF Tapping Screw Chipboard Screw Self Tek Screw Drywall Screw Hex roofing Screw Quick Details Finish:   ZINC, ZINC PLATED, Zinc plated Material:   Steel, C1022 Steel Measurement system:   INCH Metric Head Style:   Slotted hex head Place of Origin:   handan city,hebei province, China Brand Name:   JK Standard:   A/F ANSI ASTM Head ty…