hex washer self drilling screw
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Hex Washer Head Self Drilling Screws With EPDM
Self-drilling drill bit, anti-aging EPDM seal, the same colored nut as the color plate. Self-tapping drill bit: drill bit designed for thick girders; 12.5mm steel boring bar drilled once; drilling, tapping and fixing at one time. EPDM gasket for self-drilling screws with good physical and chemical resistance.
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