Optical adaptor mounting metal fittings and an optical adaptor

An optical adaptor mounting metal fittings made of a thin metal plate to be attached to an outer surface of an optical adaptor for securing to a panel, said optical adaptor that is mounted on said panel through a mounting hole thereof, wherein:

• said optical adaptor mounting metal fittings comprises a joining plate and a pair of facing side plates extending from either side of said joining plate nearly at a right angle and protruding from said joining plate at both ends in the longitudinal direction;
• each of said side plates each comprises an elastic click engagement formed by cutting out and raising a middle part of said side plate outward so that a front end thereof closely faces said panel, a first side plate piece that is on the joining plate side of said elastic click engagement and has a free front end, and a second side plate piece that is on the opposite side of said elastic click engagement to said first side plate piece and has a free front end;
• and
• first elastic engagements each obliquely extending toward said joining plate and said optical adaptor from a front end of said second side plate piece engaging with said mounting hole of said panel are provided.