The four main points of high quality fastener heat treatment

Different expansion bolt forms choose different bit diameters, and measure the maximum outside diameter of the bolt. Sleeve type, it is common, the price is cheap, M10 play d12, M12 play d14, M16 play d20, different, the biggest disadvantage is that you need to put the bolts before placing the equipment to be fixed, in case your equipment base fixing hole is heavier than the equipment, then after you put the bolts, the equipment can not be put in anyway. Repair expansion and movement expansion, drilling diameter is consistent with bolt diameter, you can put the equipment, set the hole to play, in the bolt. Friendly reminder: When the percussion drill meets the steel bar, use a rhine-drill