torx concrete screw

bugle head coarse thread concrete screw and bugle head fine thread concrete screw

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1) Material: steel

2) Finish: plain, zinc-plated, yellow zinc-plated, black zinc-plated

3) Specifications:

    1.Diameter: 3.5mm (#6); 3.9mm (#7); 4.2 mm (#8); 4.8mm (#10)

    2.Length: from 16 to 152mm

    3.Coating: black phosphate, gray phosphate, zinc, yellow zinc and decromet