Heavy Hex Head Structural Bolts from QBH company help you secure steel-to-steel
structural connections. These rugged steel bolts come in Galvanized, Hot Dipped
Galvanized, Yellow Zinc and Plain finishes.

ASTM A394 Specification covers the chemical and mechanical requirements of hexagon
and square-head zinc-coated steel bolts and atmospheric corrosion-resistant bolts for use in
the Construction of Transmission Towers, Substations, and Similar Steel Structures.
The following Types of bolts are: Type 0 includes hot-dip zinc-coated bolts made of low or
medium carbon steel, Type 1 includes hot-dip zinc-coated bolts made of medium carbon
steel, quenched and tempered, Type 2, and Type 3 includes bare, quenched, and tempered
bolts made of weathering steel. Steel for the manufacture of bolts shall be made by any of
the following processes: open-hearth, electric-furnace, or basic-oxygen. Type 1 bolts
produced from medium carbon steel shall be quenched in a liquid medium from above the
austenizing temperature.
Type 1 bolts produced from medium carbon steel to which chromium, nickel, molybdenum,
or boron were intentionally added shall be quenched only in oil from above the austenitizing
temperature.
Type 3 bolts shall be quenched only in oil from above the austenitizing temperature.
Cold-headed Type 0 bolts shall be stress relief annealed before zinc coating to
remove cold work effects such that the hardness measured anywhere on the surface or
through the cross-section shall meet the requirement specified. Different tests shall be
conducted in order to determine the following mechanical properties of bolts: hardness,
tensile strength, and shear strength.

ASTM A394 Bolts can be used for many different applications that include fastening wood,
steel, and other construction materials for projects such as docks, bridges, highway structures,
and buildings. ASTM A394 Hex Bolts and ASTM A394 Hex Head Bolts is some of the toughest
fasteners.
These ASME SA394 sturdy fasteners are used to connect heavy materials.

Bolts are externally threaded fasteners used in industrial and construction applications for
assembling two unthreaded products together and available in hundreds of combinations
of materials, heads, threads, plating, heat treating, and secondary operations. We are
manufacturer & supplier of ASTM A394 studs such as All-Thread, Tap-End, Double-End
Studs, and Combination Studs, different types of nuts such as Hex Nuts, Heavy Hex Nuts,
Overtapped Nuts, Tommy Hole Nuts, Spherical-Faced Nuts and Full Threaded Rods, full
thread rods, bonnet bolts, Carriage Bolt in a variety of finishes and sizes from 1/2" to 3 1/2".
In the petroleum and chemical industry the fully threaded stud is the most common
ASTM A394 Bolt used for flanged connections. ASTM A394 Stud bolts are available in all
thread pitches (UNC/UNRC - UNF/UNRF - 8UN) diameters and metric sizes.

ASTM A394 Hex Cap Screws- also known as machine bolts or hex bolts are available in
various bolt grade markings and strengths. Our ASTM A394 Nut Bolts Hex Bolts, Tab Bolts,
Flange Bolts, Carriage Bolts, Shoulder Bolts and T Head Bolts are used to attach machine
threaded fasteners when joining materials together.

Step Bolts

Step bolts are literally used as steps on steel communication and electrical transmission towers.
These bolts are generally provided with twoA194 grade 2H heavy hex nuts. One nut is tightened
against the thread run out. The unthreaded shank, or step length, typically ranges from 6″ to 10″.

Manufacturing
Portland Bolt manufactures step bolts in 5/8″ diameter and 3/4″ diameter. Step bolts are high strength
and are typically manufactured to ASTM specification A449.

     Jiaxing City Qunbang Hardware Co,ltd is a productiondesignsales and after-sales as one of the fasteners business,The company is located in HangjiaHu Plain,close to ShanghaiNingboZhapu ports.The geographical position is superior,the transportation is convenient,has created the natural superiority for the export.

     The company mainly produces high-strength fasteners business, bolts and nuts are the main,the main standard are DIN/ANSIASME/JIS/UNI/ISO/AS/BS/GB and so on.The product massively applies in the bridgeroadthe petroleum pipeline facilitythe wind power generation and steel structure project. Carbon steel bolts mainly have 4.8、5.8、6.8、8.8、10.9、12.9,nuts mainly have 4、6、8、10,the main material of stainless steel fastener is 201/304/316.QBH from its establishment to he present,after ten years of development,it is equipped with perfect testing equipment,and SGS and TUV have a good cooperation,each batch of products is accompanied by a 3.1 or 3.2 certificate,further escort the quality of the company.

        In 2017,we registered the trademark “QBH” in the CHINA、EU、United States,and has six fastener product patents,has obtained the Zhejiang Province science and technology small and medium-sized enterprise certificate as well as the ISO9001:2000 cerfiticate.With the continuous development and expansion of the company,as well as customer demand for product diversification,on the basis of its original production,in order to further enhance the potential for cooperation with customers,as well as to provide competitive prices.Starting in 2015,QBH has taken part in several fastener enterprises one after another,the product variety is more abundant and the price is more advantageous,and the quality can also be well controlled. QBH has always been to provide customers with efficient and convenient service and quality products,and create a pleasant trading process for customers for the mission,deeply participate in customer construction projects and make progress together with customers,this means that we need to provide better and more cost-effictive solutions,so as to help customers stand out from the competition.

         QBH promises to always provide you with excellent quality,efficient service and very competitive prices.We believe that the cooperation between us is not only based on business,but also hope that we can open new markets on the basis of win-win situation.And thank all the customers in the past to give us great support and help,make us grow up gradually,at the same time also hope that in the nere future,and you can establish new business relations.