Wing Bolt Din 316 a bolt having a head like a type nut. They are generally used in construction applications to allow users to make direct adjustments and change calibrations. It feature flat projections called the ‘head’ on the side of the screws. With rectangular wings. A thumb screw has a specially designed head that makes it easy to turn with one hand and ideal for use on parts that are frequently moved such as an access panel. The heads are winged, knurled or vertically tall and flat to provide an easy grip. A stainless steel screw is good for exterior applications. It use for easy maintenance and replacement of essential machine components.
A nut is a type of fastener with a threaded hole. Nuts are almost always used in conjunction with a mating bolt to fasten multiple parts together. The two partners are kept together by a combination of their threads’ friction (with slight elastic deformation), a slight stretching of the bolt, and compression of the parts to be held together.
Square nuts, as well as bolt heads, were the first shape made and used to be the most common largely because they were much easier to manufacture, especially by hand. While rare today due to the reasons stated below for the preference of hexagonal nuts. They are occasionally used in some situations when a maximum amount of torque and grip is needed for a given size: the greater length of each side allows a spanner to be applied with a larger surface area and more leverage at the nut.