Hex Bolts M6-M20 hot dip galvanized bolt din 931
Size：M6-M36
Manufacturing standard：ISO, GB, JIS, DIN, BS and ANSI standards, or drawings provided by customers.
Materials： iron, carbon steel, alloy steel, copper, stainless steel, plastics, high-temperature alloy, copper alloy, nickel-base alloy, high-strength alloy, corrosion-resistant alloy, etc.
Process： cold heading, punching, turning, milling, wire cutting, etc.
Treatment/Finishing: Brushing、Anodizing、Zinc Plated、Nickel Plated、Sn Plated.
Requirements： No Burrs、Scratches、Dents、Pits
Application： Structural Steel; Metal Building; Oil&Gas; Tower&Pole; Wind Energy; Mechanical Machine; Automobile: Home Decorating
Packing：bulk in cartons (25kg Max.)+wood Pallet or according to customer special demand
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Product Name
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Hex Bolts
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Size
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M8-M56 or Customized Size
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Material
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Steel,Stainless Steel,Alloy steel,Carbon Steel,Brass,Aluminum and So on
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Thread Type
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Fine Thread Or Coarse Thread or Hi-Lo Thread
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Grade
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4.8,8.8,10.9,12.9.etc
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Standard
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GB, DIN, ISO, ANSI/ASTM, BS, BSW, JIS etc
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Non-standards
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OEM is available, according to drawing or samples
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Finish
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Plain, black, zinc plated/according to your requirement
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Certification
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ISO9001,IATF16949,ISO14001
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Package
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according to customers requirement
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USE
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Automobile, aviation, new energy, high-speed rail
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Hex bolts, recognized by their six-sided heads, are a foundational component in mechanical, structural, and industrial applications. Manufactured in accordance with international standards such as DIN 933, ISO 4017, and ANSI B18.2.1, hex bolts provide reliable clamping force and tensile strength, making them essential for assemblies requiring durability and load-bearing capacity.
Available in various grades, including Grade 5, Grade 8, and A2-70 stainless steel, hex bolts are selected based on the mechanical demands of the application. For example, Grade 8 hex bolts are widely used in heavy equipment and automotive sectors due to their high tensile strength and heat-treated carbon steel composition. In contrast, A4-80 stainless steel options are ideal for corrosive or marine environments, offering long-term resistance against oxidation.
Thread options include full thread for grip-centric applications and partial thread where shear resistance is prioritized. Diameters range from M6 to M30 and 1/4″-1”, accommodating both metric and imperial systems. Surface treatments such as zinc plating, hot-dip galvanizing, and black oxide coating enhance corrosion protection and meet specific aesthetic or functional requirements.
The hex head design supports use with standard tools such as socket wrenches and spanners, ensuring efficient torque application. This head type also allows for better accessibility in tight installations compared to round-head alternatives.
From steel structure frameworks and automotive assemblies to bridge construction and heavy-duty machinery, hex bolts are engineered to perform under pressure. Their dimensional accuracy, standardized threads, and material traceability support stringent quality assurance protocols across industries.
As a dedicated manufacturer and supplier, we provide bulk supply, OEM services, and custom specifications for global clients. Our hex bolts meet the highest production and inspection standards, ensuring consistent performance and structural reliability in all critical fastening tasks.
