brazil popular pan head self drilling screw business
Self Drilling Screws - Fastener Mart. Common sizes (diameters) of self drilling screws, in whole numbers and fractional inches, range from #6 to #14 and 1/4'. Lengths span from about 3/8' to 6'. When choosing a length, keep in mind that the drill point and threads must each be longer than the total thickness of the material being fastened.
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