Expanding rubber plug that provides a really stable attachment point. Ideal for mounting in fiberglass where you don't have access to put a nut on the back.
Rawlnut also provides a rust-free and waterproof fastening.
When the screw is tightened, the rubber expander expands on the back of the mounting surface. In porous or thicker materials, it expands inside the material.
Rawlnut is made of synthetic rubber with a molded metric brass nut.
M-thread screw not included.
