6 MECHANICAL FASTENERS IN METRIC AND INCH MEASUREMENTS AND TOLERANCES, NAMELY BOLTS, CARRIAGE BOLTS, SCREWS, MACHINE SCREWS, SET SCREWS, NUTS, WASHERS, PINS, STUDS, THREADED INSERTS, PIPE PLUGS, HEXAGON KEYS, LIFTING EYE NUTS AND BOLTS, TURNBUCKLES, KEYS, STANDOFFS AND SPACERS MADE FROM THE FOLLOWING MATERIALS - STEEL, ALLOY STEEL, STAINLESS STEEL, COPPER, BRASS, AND ALUMINUM