Easy to assemble and will not loosen up! Built in washer, will not scratch lens!
Polinut combines three parts in one; washer, nut and lock tight. Plastic encapsulated metal nut with built in washer will not scratch lens, retains torque even when loosened and resists stripping out.
Eliminate customer complaints of hardware loosening up on rimless mountings.
All these styles use the 52.875 or 52.75301 wrench. Threads are for US pitch and will fit on any 1.1 diameter screw.
These nuts all all of the metric thread pitch. to choose match the nut diameter to the diameters of the screws. All these use the 52.754 or 52.75304 wrench.