Nut that nut, the two for the same object, screws, bolts, nuts (nuts) the difference between the three are as follows:

One, the appearance of the different

1, screws: the front end of the kind of pointed head, pitch is larger, beveled round rotating body structure.

2, bolts: with a nut cylindrical fasteners with threads, hexagonal head, round head, square head, countersunk head and so on.

3, nut (nut): generally flat hollow multi-faceted column structure.

Second, the role of different

1, screws: the use of the object's beveled circular rotation and friction physics and mathematical principles, step-by-step fastening of artifacts machine tools.

2, bolt: mechanical parts, with a nut cylindrical with threaded fasteners. By the head and screw (cylinder with external threads) two parts of a class of fasteners, need to cooperate with the nut, used to fasten the connection of two parts with through-hole.

3, nut (nut): nut (nut) is the mechanical equipment will be tightly connected parts, through the inner threads, the same specification nuts and bolts can be connected together.

Three, different applications

1, screws: screws for daily life in the indispensable industrial necessities: such as cameras, eyeglasses, clocks and watches, electronics, etc., the use of micro-screws; television, electrical appliances, musical instruments, furniture, etc., the general screws; as for engineering, construction, bridges, the use of large-scale screws, nuts; transportation appliances, airplanes, trolley buses, automobiles, etc., is the size of the screws and screws.

2, bolts: bolts in daily life and industrial production and manufacturing, is indispensable, bolts are also known as industrial meters. Visible bolts are widely used. The scope of application of the bolt has electronic products, mechanical products, digital products, power equipment, electromechanical products and so on.

3, nuts (nuts): mainly used in the automotive industry - cars, trucks, buses, compressors, construction machinery, wind power equipment, agricultural machinery, fasteners, foundry, drilling equipment.

Baidu Encyclopedia - Screws

Baidu Encyclopedia - Bolts

Baidu Encyclopedia - Nuts (nuts)