Every metric bolt is assigned a class number in terms of megapascals (MPa). For standard-size bolts, the thread pitch is either fine or coarse. (Nominal diameter is more of a label than a size. Choose from our selection of metric U-bolts, including over 850 products in a wide range o...
preferably below the top course. Don’t worry about the length of the brown plugs, just tap them deep into the hole until there is only 40mm (or equal to the length of the plug) of the screw/ bolt sticking out. Then the holding point is down at the bottom of the hole...