A screw is a type of fastener, sometimes similar to a bolt (see Differentiation between bolt and screw below), typically made of metal, and characterized by a helical ridge, known as a male thread (external thread) or just thread. A screw will usually have a head on one end that contains a specially formed shape that [...]
A machine screw is generally a smaller fastener (less than 1⁄4 inch (6.35 mm) in diameter) threaded the entire length of its shank that usually has a recessed drive type (slotted, Phillips, etc.). Machine screws are also made with socket heads, in which case they may be referred to as socket head machine screws. [...]
Dowel Pins: a steel pin, usually cylindrical, that can keep machine parts in proper alignment or fasten them together. Inserted into receiving holes, dowel pins hold together parts of an assembly with friction. They may also be used as location pins. These pins are common in the automotive and aerospace industries as well as in furniture [...]
Deck screws: Similar to drywall screw except that it has improved corrosion resistance and is generally supplied in a larger gauge. Most deck screws have a type-17 (auger type) thread cutting tip for installation into decking materials. They have bugle heads that allows the screw to depress the wood surface without breaking it. Bugle head: Similar to countersunk, [...]
A screw is a type of fastener, sometimes similar to a bolt, typically made of metal, and characterized by a helical ridge, known as a male thread or just thread. Countersunk Screws A common use is to allow the head of a countersunk bolt or screw, when placed in the hole, to sit flush with or [...]
Chicago screws, which are also known as a barrel nut, barrel bolt, sex bolt, post and screw or connector bolt. Chicago screws is a type of fastener (nut) which has a barrel-shaped flange and protruding boss that is internally threaded. The boss sits within the components being fastened, the flange provides the bearing surface. The sex [...]