I want to fix this cast iron light switch weighing about 3 kilo to a brick internal wall. I am thinking of using Thunderbolts, which I have never used before, because of the weight.
Only two small lugs so I think I will need small flange head bolts , M4 M5 ? and I am guessing about 50mm length. The lug is overhung by the casing so impossible to get a straight downward purchase so I will have to tighten with a spanner if thats possible. I also cannot find the drill size needed for the particular bolt size or the depth I need to drill.
Any advice would be helpful.
Only two small lugs so I think I will need small flange head bolts , M4 M5 ? and I am guessing about 50mm length. The lug is overhung by the casing so impossible to get a straight downward purchase so I will have to tighten with a spanner if thats possible. I also cannot find the drill size needed for the particular bolt size or the depth I need to drill.
Any advice would be helpful.