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A head with no markings is grade 2, one with 3 lines spaced 120 degrees is grade 5, and 6 lines spaced at 60 degree intervals is grade 8. nuts are marked in several different ways—see identification marks for hex and heavy hex nuts below.

Except for the very lowest grades, metric nuts and bolts all carry identification markings which indicate their strength. on the head of each bolt are two numbers separated by a decimal point, the full list includes ten grades from 3.6 to 14.9 but in plant and machinery only grades 8.8, 9.8, 10.9 and 12.9 are normally found.

Welcome to lituo bolts as a high tensile fastener manufacturer and supplier, lituo bolts co.,ltd is committed to superior quality and prompt delivery at the best possible prices.our main products are hex bolts,hex nuts,shear studs,structural assemblies.

Din 603 carriage bolt / round head square neck bolts made from steel class4.8 , class 8.8 or stainless a2-70, a4-80 etc.

Considering that the enterprise established, we've been committed to barrel bolt company in China sales and service, we have regularly adhering towards the "quality 1st, service first" company philosophy to serve our clients and often place this philosophy throughout our barrel bolt company sales and after-sales service. We're among the most highly effective and in depth market network of modern integrated barrel bolt company product sales firm. Welcome your inquiry!


barrel bolt company manufacturer with years's encounter, from China.We mainly supply barrel bolt company with high quality and competitive cost.we have an expert barrel bolt company solution designers.Our product is by way of the national professional certification.

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  • Double Head Threaded Screw Wholesale

    We attach value to innovation, especially with patents of China on Double Head Threaded Screw Wholesale, its superb technology has reached the international sophisticated level, and has a high reputation within the Double Head Threaded Screw Wholesale industry. Our group not only has excellent researchers and business nationwide sales and service network, but additionally are China shoppers specified brand companies.

  • Handan Fastener Hex Socket Bolts

    Supplying finest excellent Handan Fastener Hex Socket Bolts merchandise,we are specialist manufacturer in China.Wining a lot of the vital certifications of its business,our Handan Fastener Hex Socket Bolts items are very best sellers with the neighborhood and international marketplace. If you have to have additional information about our factory and item list,please click the button bellow to verify for it.

  • cheap price hub bolts

    cheap price hub bolts items supplier in China,we assistance our shoppers with most effective excellent merchandise and high level service.Getting the professional manufacturer within this sector,we've gained wealthy experience in making and managing.Our cheap price hub bolts solutions won certifications on the neighborhood and international most important authorities .For a lot more detailed information,please get in touch with us!

  • Stud anchor bolt specification astm a193 gr b7 m6 to m8 m16 m20 m8 m12 m30 stud bolt and nut

    Stud anchor bolt specification astm a193 gr b7 m6 to m8 m16 m20 m8 m12 m30 stud bolt and nut exporter from China, we are essentially the most specialist supplier from USA with ISO9001 Certification. Also the merchandise happen to be certified by mutiple safety certification.We'll offer you our Stud anchor bolt specification astm a193 gr b7 m6 to m8 m16 m20 m8 m12 m30 stud bolt and nut priducts in top-quality and most favourable value.

  • Alibaba Trade Assurance u bolt m3

    We're an enterprise that export Alibaba Trade Assurance u bolt m3 to China, we're approved by the relevant state registratio. Major Alibaba Trade Assurance u bolt m3 and sell to many regions in China, solution out there upon request. We have the spirit of "customer 1st, honesty first" principle, having a variety of enterprises established long-term cooperative partnership.

  • hex bolts manufacturer

    Offering very best excellent hex bolts manufacturer items,we are specialist manufacturer in China.Wining the majority of the critical certifications of its business,our hex bolts manufacturer items are most effective sellers on the nearby and international market. When you need to have a lot more information about our factory and product list,please click the button bellow to check for it.

  • Special Washer Carbon steel supplier

    Because the corporation established, we have been committed to Special Washer Carbon steel supplier in China sales and service, we've regularly adhering towards the "quality first, service first" enterprise philosophy to serve our consumers and always place this philosophy throughout our Special Washer Carbon steel supplier sales and after-sales service. We are one of many most highly effective and substantial industry network of modern integrated Special Washer Carbon steel supplier item sales firm. Welcome your inquiry!

  • U Bolt U Shape Bolt Square Square

    Qualified U Bolt U Shape Bolt Square Square solutions of China supplier for international and nearby trade business enterprise.Getting the very best items of our factory,our U Bolt U Shape Bolt Square Square products series have been tested and won us specialist authority certifications. For much more parameters and solution list information,please click the button to obtain additional information.

  • Various of Hook and Eye Bolt with High Quality

    Our enterprise primarily engaged and export Various of Hook and Eye Bolt with High Quality. we depend on robust technical force and continually develop sophisticated technologies to meet the demand of Various of Hook and Eye Bolt with High Quality prospects. We are sincerely welcome mates from several circles at property and abroad come to cooperate!

  • Din125 Flat Washer Manufacturer Wholesale

    We're an enterprise that export Din125 Flat Washer Manufacturer Wholesale to China, we're approved by the relevant state registratio. Key Din125 Flat Washer Manufacturer Wholesale and sell to many regions in China, product obtainable upon request. We've the spirit of "customer first, honesty first" principle, using a quantity of enterprises established long-term cooperative connection.

  • Carriage Bolt A307 Wholesale

    Carriage Bolt A307 Wholesale solutions supplier in China,we help our shoppers with greatest quality merchandise and higher level service.Getting the professional manufacturer in this sector,we've got gained wealthy experience in making and managing.Our Carriage Bolt A307 Wholesale products won certifications on the regional and international principal authorities .For more detailed information,please get in touch with us!

  • High Torque Spring Washer

    We are suppliers of all kind of High Torque Spring Washer moved in market place for fantastic sales, we've High Torque Spring Washer type and specification's which will suit our customer's satisfaction. We've also attached High Torque Spring Washer samples and other of our requires with the above attached catalog sample.

We Export

If you need additional information, or have any special requests for equipment, please fill out the following form.

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