Self Drilling Screws On B2BChinaSources.com
The Spec Of Self Drilling Screw : 1. Self-drilling screws for the building and construction industries. For those application fixig to steel, timber and plasterboard to steel. 2. Self-drilling screws intended for drilling and tapping into layered or unlayered steel with a minimum total thickness of 0.9mm shall be type ASD, BSD or CSD. 3. Type ...
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