What size drill bit is used for M8?
1 Answers
m8×70 expansion bolts use a 12mm drill bit. Explanation of the reason: When drilling wall holes or concrete floor holes with an impact drill, the drill bit used should be 4mm larger than the expansion bolt. Expansion bolts generally refer to metal expansion bolts. The fixing of expansion bolts utilizes the wedge-shaped slope to promote expansion and generate frictional gripping force, achieving a fixing effect. One end of the screw is threaded, and the other end has a taper. Additional information: 6×60 means the total length is 60mm, the sleeve length is 45mm, diameter is 8mm, wall thickness is 0.7mm, and the surface is color zinc-plated; the screw length is 60mm, diameter is 6mm, the threaded part is 35mm, the bottom rod hammer is 8mm conical, and the surface is color zinc-plated.