Painted Hex Head Mechanical Galvanized self tappingdrilling screws and Rubber Washer for metal sheet

Description:
 
Self Drilling Screws drill their own holes when they’re screwed into materials such as wood, plastic and metal. Drilling screws can be divided, according to the implementation of standards: GB GB / T, German standard DIN, Japanese standard JIS, international standard ISO.
A. According to the purpose and shape can be divided into the following categories:
1. Cross recessed pan head self drilling tapping screws .Cross recessed pan head drilling screws with tapping screw thread implementation of standards.

2. Cross recessed countersunk head self drilling screws .Cross recessed countersunk head drilling screws with tapping screw thread implementation of standards. It is also known as flat head drilling, salad head drilling.
3. Cross recessed countersunk head drilling screws .Cross recessed countersunk head drilling screws with tapping screw thread implementation of standards. This specification is countersunk head in the market with a less is more.
4. hex flange self drilling screws .Hexagon flange head drilling screws with tapping screw thread implementation of standards. It is also known as hexagonal Dahua end driller, drilling screws are in the most commonly used and is the maximum amount of the specification.
Self Drilling screws, which the tail is sharp end or the drill,. Without the aid of processing, the screws can be set up on the base material, direct drilling, tapping, locking, significant which can save much construction time. For more common screws, the screws maintain high power. After long time of the combination is not loose, the use of safe drilling tapping once simple operation.
Uses: It is a wood screw, mainly used in steel steel tile fixing can also be used for sheet simple building fixed. It can not be used for metal to metal bonded and fixed.