A selection of Cup Square Hex Carriage Bolts / coach bolts, Penny / repair / flat washers, Square plate washers / Square Washers / construction square plate washers, locking nuts, Wing nuts, Hex nuts and screwed rods.
Cup Square Hex Carriage Bolts / coach bolts have a round head and a square neck that prevents the bolt from turning whilst the nut is tightened, and forms a self locking function. Commonly used in timber applications for joining joists and other wood components.
When used in conjunction with a screw fastener such as a bolt and nut, a washer serves either to keep the screw from loosening or to distribute the load from the nut or bolt head over a larger area. They can also be used to make a connection to a hole that has been enlarged by rust or wear.
Locknut / lock nut / locking nut / self-locking nut / prevailing torque nut / stiff nut / elastic stop nut.
A locking nut is a type of nut that resists loosening under vibrations and torque when properly threaded onto a bolt. Extremely common in industry and home applications they are used in situations where vibration or rotation would cause a normal nut to loosen. They are different on each side, making them very difficult to get off.
Hex nuts are a six-sided nut that fastens screws and bolts efficiently and securely. They are the most common hexagonal fastener that has internal threads that screw on to the shank of a bolt or a hex cap screw. The hexagonal shaped nut is versatile and easy to work with, being ideal for tight spots.
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