1.Bolt&screw:, 2. Socket head bolt&screews: non head socket set screw, hex socket round<br /> head/hex socket flat head bolt&screw, hex wrench etc., 3. Nut: Hex/heavy hex/structra,<br /> hex/heavy hex/structural/round head square neck/carriage/flange/square/flat/welded<br /> bolt&screw etc.