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Similar to a sheet metal screw, but it has a drill-shaped point to cut through the substrate to eliminate the need for drilling a pilot hole.
These steel Hanger Bolts are ideal when you want the strength and easy assembly of a bolted connection on a wooden joint. Hanger Bolts are perfect for knockdown furniture, and for joining table legs to aprons when used with our Corner Brackets for Table Aprons. Pointed end of hanger bolt screws into a pilot hole in wooden member, while the other serves as a machine threaded stud that accepts a nut, T-nut or threaded insert. Deep screw threads bite into the wood to eliminate stripping and pull-out problems Hanger Bolts have threaded areas at both ends, a lag screw thread at one end and machine screw thread on the other. A hanger screw is a headless fastener that has machine screw threads on one end and self-tapping threads on the other designed to be driven into wood or another soft substrate. Often used for mounting legs to Also known as a dowel screw
Lag bolts, also called lag screws, are basically "large wood screws". A typical lag bolt is a 150 mm long, 13 mm diameter screw (6-inch-long, half-inch-diameter screw) with coarse threads of a wood-screw or sheet-metal-screw threadform (but larger). The head is typically an external hex. The materials are usually carbon steel substrate with a coating of zinc
Self-tapping is the ability of a screw to advance when turned, while creating its own thread.[citation needed] This ability is sometimes created by a gap in the continuity of the thread on the screw. These edges cut a thread as the screw is driven in to the material. The cutting edge drills away the material, leaving a hole for the screw to go into
Wood screws are commonly available with flat, pan or oval-heads. A wood screw generally has a partially unthreaded shank below the head. The unthreaded portion of the shank is designed to slide through the top board (closest to the screw head) so that it can be pulled tight to the board it is being attached to
