Fastener Customizable Screws Are Available in a Wide Range of Categories Connecting Fasteners

Product Applications

1. Basic Definition and Use
A screw, or screw (nail), is a type of fastener that is used to attach or fix objects. It usually consists of a screw and a nut, and the screw moves axially by rotating the nut to achieve the effect of tightening. Screws are widely used in machinery, construction, furniture, and other fields, and are an important tool for connecting and fixing objects.

2. Main types and characteristics
Classification by shape:
Cylindrical Head Screws: The head is cylindrical and is often used in applications where a large head contact area is required or a smooth transition is required.
Countersunk Screws: The head is tapered or hemispherical and can sink into the mounting holes, giving a flatter surface.
Pan head screws: The head is flat and large, and is often used in situations where a large head support area is required.
Hex Head Screw: The head is hexagonal, which is easy to tighten and remove with tools such as a wrench

Classification by application:
Wood screws: Specialized in joining or fixing wood, usually with thicker threads and a larger head.
Machine screws: suitable for joining and fixing in mechanical equipment, electronics, etc., usually with thinner threads and smaller heads.
Self-tapping screws: have sharp threads that can be screwed directly into the material without pre-punching.
Locking screws: used in occasions where it is necessary to prevent loosening, such as automobile engines, precision instruments, etc.
Classification by thread type:
Inch thread screws: such as BSPP (inch cylindrical pipe thread), BSPT (inch tapered pipe thread), etc., which are mainly used for connection and fixing under the imperial standard.
Metric threaded screws: follow the international standard ISO 68-1 and are the most widely used thread type in most countries and regions.
3. Special types and uses
Ball Screw: A special type of screw used in drive systems that require high precision and efficiency. It contains balls inside, which can significantly reduce friction and wear, and improve transmission efficiency.
Set screw: Also known as set screws or set screws, they are usually used to fix the position of shafts, bushings, and other parts to prevent them from loosening or turning.
Thumb Screw: The head is large, so it is easy to tighten or loosen directly by hand. It is often used in situations where frequent disassembly or adjustment is required.

Qingdao Xinquanxi Metal Products Co..Ltd. was established in 2001 (formerly known as Qingdao Quanxi Hardware Cable Co., LTD.), located in Jimo District, Qingdao city, the company was mainly engaged in the production and sales of Japanese open-body turnbuckle, die forging shackles, products are mainly sold to the United States, Russia, Japan and other countries.

In September 2019, with the continuous development of the company's business, it merged with Qingdao Ruihongjie Industry and Trade Co., LTD., and changed the company name to Qingdao Xinquanxi Metal Products Co., LTD.  At the same time, the business range is gradually expanding, the main production and operation of hardware rigging, wire rope connecting parts, hardware machinery, Marine and automobile connecting parts, all kinds of forging, sheet metal, stamping, casting parts and other products.  After more than 20 years of development, we have established a complete system, with strong technical capacity, mature production methods, advanced production equipment and testing methods.

 We always adhere to the principle of quality first, safe production, timely delivery, customer satisfaction after sale service, and constantly research and learn product expertise, with the best quality products to serve customers.