Stainless Steel 304 316 Thread Hex Self Drilling Metal Screws and Washers 

Description:
 
Hex Washer Head Self Drilling Screw is also called HWH drilling screw. The 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.
Hex flange self drilling screws .Hexagon flange head drilling screws with tapping screw thread implementation of standards: GB / T 15856.4-2002 has the following specifications :( 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.