Wood Screws – For joining two pieces of wood. Un-threaded shank allows top piece of wood to be drawn tight to the bottom piece.
Sheet Metal Screws – Hardened steel. Self-tapping fully threaded shank to join sheet metal and draw together. Can be used in wood as well, but will not draw pieces together unless a hole larger than the screw is predrilled in top piece.
Machine Screws – General-purpose fasteners for all types of materials, use with nuts or directly into a threaded receptacle. Easy to remove and re-install. Does not rely on threads being created in material.
Lag Screws – For fastening directly into wood surfaces where access to opposite side is restricted. Use with lag screw shields for masonry applications.
Carriage Bolts – Smooth round head for appearance, security & safety. Square neck will lock into wood to allow tightening.
Hex Bolts – General-purpose fastener for all types of materials. Hex head allows for tightening from both sides.