Ningbo Datian Fastener Co., Ltd.
Ningbo Datian Fastener Co., Ltd.
Excellent Datian Nuts And Bolts
Datian Products

To make the best fastener nuts and bolts, Datian (DT) Fasteners has a complete set of strict quality inspection systems and solutions from raw materials entering the factory to finished product packaging. First of all, when we purchase raw materials for our standard bolt and nut, we will test the appearance, size, elements, performance, and harmful substances; secondly, during the production process, we will test the appearance, size, percussion test, and forging flow line of fasteners; When heat-treated products, we will test the appearance, hardness, torque, and tensile force; when the final surface treatment is carried out, we will do hydrogen embrittlement test, coating and salt spray test according to customer requirements. As a leading nuts and bolts manufacturing company in China, DT is equipped with standard quality testing laboratories and complete testing equipment to ensure the quality of our nuts and bolts for sale delivered to customers.

Advantage of Datian Nuts And Bolts

Datian Hardware Nut Bolt Heat Treatment DT Equipment List

As a professional custom fastener manufacturer, Datian (DT) Fasteners has a complete quality assurance system and has passed the IS09001 quality system certification to ensure that every process from the incoming raw materials to the finished nuts and bolts bulk is effectively supervised, so as to ensure that our nuts and bolts for sale can pass Zhejiang provincial and national quality sampling inspections every year. Our steel nuts and bolts wholesale has successively been rated as high-quality products in Zhejiang Province and national high-quality products. We have provided supporting services for both domestic and foreign key projects, large enterprises, and group companies for a long time, and has the right to import and export. Our nut bolt manufacturing business proceeds well both at home and abroad and enjoys a good reputation.

Datian Fastener ISO Certificate
Datian Fastener Company

DT Fasteners has a mature heat treatment production line in-house. Bolts with mechanical properties of grade 8.8 and higher and fine-tooth nuts of grades 10 and 12 generally need to be quenched and tempered to meet the requirements of the mechanical performance regulations. According to the thread accuracy and hardness of the standard bolt and nut, the processing method, and the specific requirements of the user, either the finished product heat treatment or the semi-finished product heat treatment is carried out. The heat treatment of the finished fastener nut bolt is the heat treatment performed after the parts are all processed and formed (including threads).

Datian Fastener Heat Treatment
Datian Fastener Heat Treatment
  • Cold forming machine: 12 sets (diameter range:3/8'~1-1/8', M10-M30)

  • Hot forming machine: 4 sets (diameter range:1-1/8'~4', M30-M100)

  • Heat treatment: full line 1 sets include Annealing, Quenching and Tempering

  • Automatic thread rolling machine: 24 sets

  • CNC machine: 12 sets

  • Blacking coating machine: full line 1 sets

Datian Fastener DT Equipment List
Datian Fastener DT Equipment List

How Do Nuts And Bolts Work?

How Do Nuts And Bolts Work?

Mechanical equipment is inseparable from screws and nuts in production, and it is the key to fastening everything. It is almost ubiquitous and is a very common part.

As a kind of fastener, the hardware nut bolt can effectively make the connection of objects stronger and tighter. Usually, a wrench or pliers are used for tightening work, which can be widely used in various industries. Nuts can be used in the automotive industry, agricultural machinery industry, construction machinery industry, shipbuilding industry and other places. The household appliances and cars we usually use need high-strength nuts and bolts for reinforcement, which is very practical. In fact, fastener nut bolts are also divided into many specifications and models, such as hexagonal nut specifications and square nut specifications.

The raw materials for the manufacture of nuts are copper materials, alloys, stainless steel, and carbon steel. All kinds of general hexagonal and octagonal nuts can be used for casting. The place where they are used usually does not require high product quality and accuracy; due to the comparison of square nut specifications there are many, so it needs to be subdivided according to the location of the application. It is usually cast with strong raw materials such as carbon steel and stainless steel, which are often stronger and more durable when welded.

Fasteners Materials

Nuts And Bolts Material

Datian Uses The Most Suitable Materials To Guarantee Fasteners' Quaility
At present, fasteners on the market are mainly made of carbon steel, stainless steel and copper.
To Find More Fasteners Materials
Carbon Steel

We distinguish low carbon steel, medium carbon steel and high carbon steeland alloy steel by the content of carbon in carbon steel material.

  • High carbon steel

    We distinguish low carbon steel, medium carbon steel and high carbon steeland alloy steel by the content of carbon in carbon steel material.

  • Low Carbon Steel

    Low carbon steel C% 0.25% is usually called A3 steel in China. Foreign countriesare basically called 1008,1015,1018,1022,etc. Mainly used for grade 4.8 bolts,grade 4 nuts, small screws and other nut bolt wholesale without hardness requirements.

  • Medium Carbon Steel

    Medium carbon steel 0.25%≤C%≤0.45% is usually called No. 35 and No. 45 steel in China, and is basically called 1035, CH38F, 1039, 40ACR, etc. abroad. These steel bolts and nuts are mainly used for grade 8 nuts, grade 8.8 bolts and grade 8.8 hexagon socket products.

  • Alloy Steel

    Add alloying elements to ordinary carbon steel to increase some special properties of steel: such as 35, 40 chromium molybdenum, SCM435, 10B38.


Commonly used materials are brass and zinc-copper alloys. The market mainly uses H62, H65, H68 copper as standard parts.

Stainless Steel
Performance Class: 45, 50, 60, 70, 80 Mainly divided into austenite (18%Cr, 8%Ni) with good heat resistance, good corrosion resistance and good weldability. A1, A2, A4 Martensite and 13%Cr have poor corrosion resistance, high strength and good wear resistance. C1, C2, C4 ferritic stainless steels. 18%Cr has better upsetting and corrosion resistance than martensite. At present, the imported materials on the market are mainly Japanese products. According to the level, it is mainly divided into SUS302, SUS304 and SUS316.
Nuts And Bolts Uses
Datian is a professional custom fastener manufacturer, if you are interested in quality wholesale fasteners, please contact us.
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