What is the difference between a triangle screw and a regular cylindrical screw?

The triangle is designed for locking, in order to make the lock tighter and more secure. Ordinary cylindrical screws are machine screws, which belong to ordinary fastening.

Ordinary threads, also known as triangular threads, are different from trapezoidal threads.

and zigzag threads. The cross-section of the triangular thread profile is an equilateral triangle.

Screws are made use of the bevel of an object, circular rotation, and friction.

The principles of physics and mathematics are tools for the gradual tightening of objects and components. Screws are a generic term for fasteners, everyday colloquialism. Screws are an indispensable industrial necessity in daily life

Such as very small screws used in cameras, glasses, clocks, electronics, etc.; general screws for televisions, electrical products, musical instruments, furniture, etc.; As for engineering, construction, and bridges, large screws and nuts are used.

Transportation equipment, airplanes, trains, automobiles, etc., are used with both large and small screws. Screws have an important role in industry, and as long as there is industry on the earth, the function of screws will always be important. The screw is a common invention in people's production and life for thousands of years, and it is the first major invention of mankind according to the application field.

Ordinary threads, also known as triangular threads, are distinguished from trapezoidal threads and zigzag threads. The cross-section of the triangular thread profile is an equilateral triangle.

The screw on the left in the picture is a self-tapping screw, which is mainly used for thin plates, and the hole can be screwed in without tapping.

The one on the right in the picture is an ordinary screw, but this product is not very qualified, the outer diameter size is smaller, and it looks bald, so it doesn't look like a triangle.

Recently, I have been looking for information on this triangular cross-section, and I don't know if it is convenient for you to communicate there.

There are three main classifications of screws: ordinary screws, self-tapping screws and expansion screws.

1. Ordinary screws.

A screw is a tool that uses the physical and mathematical principles of the oblique circular rotation and friction of an object to tighten the mechanical parts of the object step by step. Screws are a generic term for fasteners, everyday colloquialism. Screws are an indispensable industrial necessity in daily life

Such as very small screws used in cameras, glasses, clocks, electronics, etc.;

2. Self-tapping screws.

Generally, it is a wooden screw with a pointed tip, a coarse tooth, and a hard texture, as well as aluminum alloy and plastic. A special type of self-tapping screw used for opening threads in metal holes is called tapping.

3. Expansion screws.

The expansion screw is generally said to be a metal expansion screw, and the fixing of the expansion screw is to use the wedge-shaped slope to promote the expansion to produce friction grip and wrapping force to achieve the fixing effect. The screw is threaded at one end and taper at the other.

Commonly used snail silk species.

A: Machine Screw: DU

Self-tapping screw, English name self-tapping screw is a kind of threaded fastener that is self-tapping and drilling the mated female thread in the pre-drilled hole of metal or non-metallic material. Self-tapping screws are mostly used for connections between thin metal plates (steel plates, saw plates, etc.). When connecting, first make a threaded bottom hole for the connected part, and then screw the self-tapping screw into the threaded bottom hole of the connected part.

Due to the high hardness of the thread surface of the self-tapping screw (45HRC), the internal thread can be tapped in the threaded bottom hole of the connected piece to form a connection.

Hope it helps! Thank you!

The full name is: Countersunk Self-Tapping Screw.