Self-drilling screws are widely accepted due to their advantages such as hardness, pull-out strength, and holding power, ensuring they won’t loosen even after prolonged assembly, and the ease of use for safe drilling and tapping. So how do you test the hardness of a self-drilling screw? Hebei Wotu Fastener Manufacturing Co., Ltd. will now provide you with relevant methods.
We can have the hardness tested at a specialized heat treatment plant after heat treatment. Split a randomly selected metric nut in half and test the hardness of its core. For imperial nuts, generally, one side is split open (i.e., two cuts are made on one side), and the hardness of the center of that cut surface is tested. For smaller nuts, the cross-section is usually ground down by 20-30 microns before testing the hardness.
Self-drilling screws, as a type of wood screw, far surpass other similar products in structure, usage, and performance. When choosing self-drilling screws, it’s essential to pay attention to relevant knowledge.
Hebei Wotu Fastener Manufacturing Co., Ltd. uses imported and domestically sourced raw materials from major steel mills. Our production equipment is all from Taiwan, and we possess complete testing processes and equipment. We operate under a modern enterprise system and strictly manage our operations according to the ISO9001:2015 quality management system. The company uses “Wotu” as its registered trademark.
If you need self-drilling screws, trust us; choosing us is the right choice!
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