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Hex Bolts

Black Hex Bolts DIN931 DIN933 Grade 8.8 10.9 12.9:


  • Black Hex Bolts DIN931 DIN933 Grade 8.8 10.9 12.9
  • Black Hex Bolts DIN931 DIN933 Grade 8.8 10.9 12.9
  • Black Hex Bolts DIN931 DIN933 Grade 8.8 10.9 12.9
  • Black Hex Bolts DIN931 DIN933 Grade 8.8 10.9 12.9
  • Black Hex Bolts DIN931 DIN933 Grade 8.8 10.9 12.9

Black hex bolts are a type of fastener used in various applications. The term "black" refers to their surface finish, which is typically achieved through a process called black oxide coating. Black oxide coating is created by immersing the bolt in a chemical bath that forms a thin layer of magnetite (Fe3O4) on the surface, providing protection against rust and other forms of corrosion. It improves the bolt's resistance to corrosion, reduces light reflection, and gives it a dark appearance. Black hex bolts are often preferred for applications where a sleek, dark appearance is desired or when corrosion resistance is required.

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Product Description

Brand Name: Yunteng

Standard: DIN931/933

Finish: Plain

Material: Steel

Package: Small Box Packed

Certificate: ISO9001 ISO14001 ISO45001 SGS

Supply Ability: 10000 ton per Month

Grade:  A2-70 A4-70 A4-80 etc.

Delivery time: 5-20days

Port: Tianjin Qingdao

MOQ: 1000pcs

How to select different surface treatments for hex bolts in various industries

In engineering and manufacturing, hex bolts are essential fasteners used in various applications. To meet different needs and environmental conditions, hex bolts undergo various surface treatments to enhance their performance and durability.

Black Oxide Hex Bolts: Black oxide is a surface treatment method that generates a black oxide layer on the bolt's surface, improving its corrosion and wear resistance. This treatment is suitable for applications that require low reflectivity, aesthetic appeal, and mild corrosion resistance. Black oxide hex bolts are commonly used in automotive components, electronics, and decorative applications.

When choosing the appropriate surface treatment, factors like the operating environment, corrosion risk, aesthetic requirements, and budget must be considered. The right surface treatment protects the bolts from corrosion and damage, ensuring they function effectively throughout their intended lifespan.

What benefits will we gain by choosing us

Black Hex Bolts

Unrivaled Quality: Our Hex bolts are crafted with precision using top-quality materials, ensuring unmatched durability and performance for your projects.

Extensive Selection: We offer a wide range of hex bolts, providing tailored solutions to meet your specific requirements and applications

Expertise You Can Trust: With years of experience in the industry, Hebei Yunteng is your reliable partner, offering expert advice and support.

Competitive Pricing: Get the best value for your investment with our competitively priced hex bolts without compromising on quality.

Timely Delivery: We understand the importance of time, and our efficient logistics ensure timely delivery, keeping your projects on track.

Customer Satisfaction: We prioritize your satisfaction, delivering top-notch products and excellent service to exceed your expectations.

Choose Hebei Yunteng for Hex Bolts that deliver superior quality, tailored solutions, and reliable expertise, ensuring success in every project you undertake.

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