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The tail of the drill tail screw is in the shape of a drill tail or a pointed tail, requiring no auxiliary processing. It can be directly drilled, tapped, and locked on the setting materials and foundation materials, greatly saving construction time. Compared to ordinary screws, they have a high tensile strength and maintenance force, and will not loosen for a long time after combination, making them safe to use. Specifications include: Φ five point five × 20mm - Φ five point five × 135mm Φ six point three × 25mm - Φ six point three × 300mm。
The tail of the drill tail screw is in the shape of a drill tail or a pointed tail, requiring no auxiliary processing. It can be directly drilled, tapped, and locked on the setting materials and foundation materials, greatly saving construction time. Compared to ordinary screws, they have a high tensile strength and maintenance force, and will not loosen for a long time after combination, making them safe to use. Specifications include: Φ five point five × 20mm - Φ five point five × 135mm Φ six point three × 25mm - Φ six point three × 300mm。