Self Tapping Screw, Self Drilling Screw, Roofing Screw manufacturer / supplier in China, offering TGR/Tsingri Carbon Steel Heat Treated Phillips Oval Head Self Drilling Screws With Customized Surface, TGR/Tsingri All-purpose Screws Fasteners Heavy Duty Fastener Insulation Membrane Plates, TGR/Tsingri FM4470 Standard CR-10#14 Heavy Duty Insulation Screws AZ55 Plates and so on.
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