The PPKP-M8 and PPKP-M10 wide washer, together with suitable PPKP-M10x70 standing bolt and PPKP-12/60 wall anchor washer are designed for mounting NKP brackets to the walls or ceilings of a building for lighter loads. Wide washer, together with suitable standing bolt and nut are designed for mounting NKP brackets, such as the NKP-SNT wall bracket to the NKP-VNU hanging bracket; or for fixing together - e.g. NKP-C profile. The appropriate fasteners depend on the base and load of cable trays and cable ladders.