6 Building and construction materials and elements of metal, all in the nature of metal piles, reinforcement plates, cutout covers, metal sheet panels in the nature of door panels of metal, roof panels of metal and wall panels of metal, metal protection windows, and refractory construction materials of metal; metallic mountings, namely, metal mounting brackets for general use; mountings, consisting of various materials, primarily composed of metal, all in the nature of metal mounting brackets for general use; connectors of metal, namely, structural joint connectors of metal; connectors, consisting of various materials, primarily composed of metal, all in the nature of structural joint connectors of metal; ironmongery being small items of metal hardware, namely, springs, washers, pulleys, screws, nuts, bolts, rivets, hooks, serrated washers, rollers for garage doors, self-tapping bushings, and springs; fittings of metal for building, namely, metal window fittings, door fittings of metal, and metal fittings for metal pipes; door fittings of metal; snap connectors of metal, namely, bolt snaps of metal, and metal self-aligning demountable snap fasteners consisting of press fasteners and press studs for use in attaching panels, closures, hatches, floors, and furniture in buildings; fittings of metal for sheet metal cabinets with snap mountings of metal; locks of metal not for electric purposes, for use with sheet metal cabinets with snap mountings of metal, specifically metal deadbolt rim locks, metal hinges, latches of metal, snap locks being metal locks, and padlocks of metal; bolts of metal for locks; bolts of metal with snap mountings of metal, all in the nature of hinges of metal possessing snap mountings, in particular, hinges in the form of clip mounting, screw, profile, cabinet row, welding reel, journal box and three-dimensional hinges; knobs and door handles of metal, possessing snap mountings; foundry chill-molds of metal; fittings of metal, namely, key hole covers, keys being metal key blanks, profile cylinders in the nature of lock cylinders of metal, profile semi-cylinders in the nature of lock cylinders of metal, spring bolts in the nature of metal dead bolts, metal bar locks with snap mountings, and metal window casement bolts and latches; fittings, namely, sash fasteners of metal for windows possessing snap mountings, and metal turn latches possessing snap mountings