DIN933 grade 4.8 8.8 10.9 12.9 zinc plated black HDG hex bolt head mark china manufacturer

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Product Overview


DIN912 Carbon steel black Internal hex socket bolt lowest price



Product Description


  • Material: Steel
  • Surface Finish: Zinc Plating
  • Cross Slot
  • Complete with Square Nut
  • Various Thread Diameters Available: M5, M6, M8, M10, M12
  • Various Screw Lenghts Available: 16 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 50 mm, 60 mm, 80 mm, 100 mm, 120 mm, 140 mm, 160 mm, 180 mm


DIN912 Carbon steel black Internal hex socket bolt lowest price


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Company Information

 Tianjin Huazhen Fastener Co., Ltd. was founded in 2003 as a private 

Enterprise specializing in the manufacture and trade of assorted nails and screws. 

Our range of screws covers dry wall screws, chipboard screws, self-tapping screws 

And self-drilling screws. As for our selection of nails, we can supply ST nails, SF nails, standard nails, roofing nails

And joint nails. Every year, we output 3,500 metric tons of screws and nails. 

We currently export to America, Europe, the Middle East, South Africa, 

Southeast Asia and many other countries and regions worldwide. 

As a professional manufacturer, our clientele can rest assured they are receiving the highest quality merchandise

And the best possible service. For more information of our products, please feel free to contact us today.

DIN912 Carbon steel black Internal hex socket bolt lowest price

Test Details


After order is confirmed, we have a meeting with the main people who work for workshop before production.

Investigate all the workmanship and technical details, make sure all the details are under control

1. Inspect all the materials when arrived, ensure they will match customers' requirements

2. Inspect the semi-finished goods

3. Online quality control

4. Final products quality control

5. Final inspection while packing up all the goods. If there is no other problem at this stage, 

   Our QC will issue the inspection report and release for shipping

6. We care your goods during shipping: Boxes can be able to withstand typical impacts during handling and shipping





1, What is the surface Treatment?

Galvanized, Yellow zinc plated,Black Phoshpated,EG.HDG.MG.

2, What is your material?

Carbon steel and stainless steel

3, Do you provide samples?

Yes, Please contact us for more details

4, Where is the port of shipment?

Xingang Port

5, How long is your production time?

Our production time is generally 30-45days( based on quantity)

6,What payment terms your company are usually choose?


More Details, Please Click Here


We Have other screw and nails for your choice: Chipboard Screw, Drywall Screw, Self tapping screw, self drilling screw, hesagon head wood screw, screw driver bits, common nails, blind rivet, square boat nail, cut Masonry nail, Pastic/Metal cap nail, plastic/paper strip nail, L head cleat nail, staples, ST/FST/WT Nail, F Brad nail, concrete steel nail, Gas pin nail, sod staple, fence staple, coil nail, roofing nail, roofing nail with umbrella head, pallet nail, roofing screw, duplex nail, brad nail, bolt, nut, metal washer.



We had exported to USA, Russia, Ukraine, Australia, UAE, South Africa, Brazil, Chile, Singapore, Malaysia, Indonesia etc. and won good reputation from customer.



Contact information:


May Zhang

Email: sales3#tjhz.com

Mobile/Wechat: 0086 188 9220 5869

Skype: mayzhang910







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