Who We Are?

ASUDA is a leading manufacturer and distributor of high-quality fasteners. We specialize in producing a wide range of products, including bolts, screws, nuts, washers, and other related hardware items and Standard including DIN GB JIS ASME/ANSI ISO and others customer made products.

  • Machine Screws, Set Screws, Self Tapping Screws, Bolts, Nuts, Customers Made Fasteners…
  • Standard including: DIN | GB | ANIS | JIS | NONE STADNARD
  • Material: Stainless Steel 304 (A2) | Stainless Steel 316 (A4) | Stainless 410 | Carbon Steel | Alloy Steel


  • We produce  most commen used standard fastener products and also we help people pruchase some screw we do not produce.

  • The normal lead time of our stocked products is 1 week, after everyting confirmed.

    For the products out of stock and we need reproduce, the lead time will be 30 days after everyting confirmed.

  • We provide several packing for our customer choise.

    1, Box packing and 12 to 24 boxes in one carton

    2,Plastic bags and 6 bags in one carton.

    3,Woven bags and each bag weight will be less than 35KGS.

    For bulk order we will put all packed good on wooden pallet.

  • For bulk order:

    Our offer usually is FOB Chinese Ningbo Port or Wenzhou port.

    For Small order:

    Our price will be seperated to products cost and delivery cost.

    Payment :

    For bulk order we accpet T/T payment 30% as deposite and 70% against documents copy or L/C at sight.

    For small quanitty we offer paypal payment  or T/T 100% before delivery.

Contact Us

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Cold heading process for fasteners

fastener work shop
Cold heading process is a common process for manufacturing the heads of fasteners such as bolts, screws, pins, and rivets. Normally, what we refer to as heading is actually a type of cold heading. Cold heading is a forging method that uses a mold to compress and shape metal bars at room temperature. The specific operation process is to put the metal bar into a cold heading machine and squeeze it into shape through pressure. During the extrusion process, the...

How to choose fasteners in the photovoltaic field

Corrosion and impact resistance: Most equipment in photovoltaic power generation projects, such as solar brackets, require long-term outdoor exposure. Therefore, fasteners with good corrosion and impact resistance should be selected to ensure the service life of the equipment. Therefore, various stainless steel fasteners are preferred, such as various stainless steel outer hexagonal bolts, nuts, etc.     Anti loosening: Outdoor working conditions often encounter various climate changes, such as strong winds and heavy rain, which have high requirements for equipment stability. Various anti loosening...

Hot dip galvanizing

Hot dip galvanizing, also known as hot-dip galvanizing, is a method of obtaining a metal coating on steel components by immersing them in molten zinc solution. In recent years, with the rapid development of high-voltage transmission, transportation, and communication industries, the requirements for protection of steel parts have become increasingly high, and the demand for hot-dip galvanizing has also continued to increase. one Protective performance of hot-dip galvanized layer Usually, the thickness of the galvanized layer is 5-15 μ m. And the...

Turning Technology and Classification of Copper Nuts

copper nut
Copper nuts have many characteristics, such as being less prone to rust, anti-corrosion, easy to conduct heat, and strong conductivity. Copper nuts are generally used in environments such as rust prevention, high temperature, conductivity, and thermal conductivity, such as faucets, valves, electrical switches, etc. Another main use of copper nuts is injection molding, which is embedded into plastic parts after heating or directly molded for injection molding, as mentioned earlier. Below is an introduction to the turning technology and...