1. Outer hexagon bolt, cylindrical head inner hexagon screw (cup head), inner hexagon concave end set screw (concave end machine meter), inner hexagon flat end set screw (flat end machine meter).
2. Internal hexagonal pointed set screw (pointed machine meter), internal hexagonal column end set screw (column end machine meter), countersunk internal hexagonal screw (flat cup).
3. Half round head hexagon socket screw (round cup), cross slot pan head machine screw, cross slot countersunk head machine screw, cross slot large flat head machine screw, cross slot pan head self tapping screw.
4. Cross recessed countersunk head self tapping screws, cross recessed large flat head self tapping screws, full thread screws (threaded rods), hexagonal nuts, flange nuts, nylon nuts, and cap nuts.
5. Butterfly nuts, flat washers, spring washers, serrated washers, split pins, etc.