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High-Quality Hexagon Socket Head Cap Bolt DIN 912 from China Suppliers - Factory Direct Pricing and Fast Shipping
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High-Quality Hexagon Socket Head Cap Bolt DIN 912 from China Suppliers - Factory Direct Pricing and Fast Shipping

High-Quality Hexagon Socket Head Cap Bolt DIN 912 from China Suppliers - Factory Direct Pricing and Fast Shipping

Introducing our high-quality fasteners, available for FOB price ranging from US $0.60 to $9.99 per piece. As a leading China supplier and factory, we have a minimum order quantity of 100 pieces, with a robust supply ability of 10,000 pieces per month. Our products feature a variety of surface treatments, including Plain, Zinc Plated (ZP), GALVANIZED, Hot Dip Galvanized, and Dacromet. We utilize a range of materials, such as Carbon Steel, Alloy Steel, Stainless Steel, Brass, and Copper, ensuring durability and strength. Our fasteners comply with various standards, including DIN, GB, UNC, BSW, and JIS. We take pride in our quality, holding certificates like ISO9001, ISO14001, ISO45001, and SGS. Available grades include 4.8, 8.8, 10.9, 12.9, A2-70, A4-70, and A4-80, making our products suitable for diverse applications. Choose us for reliable and high-performance fasteners from a reputable China supplier and factory.

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Product Description

Product nameHexagonal socket screw
SizeM6 / M8 / M10 / M12
Grade4.8 / 8.8 / 10.9 / 12.9
MaterialSteel / Stainless Steel
Surface treatmentYZP
StandardDIN / ISO
CertificateISO 9001
SampleFree Samples
Definition and Structural Characteristics

An internal hexagonal screw is a fastener with a hexagonal groove (internal hexagonal hole) on the head, which requires the use of an Allen Key or a hexagonal screwdriver head matched with an electric tool for installation and removal.

Structural Features
  • Head types: Common cylindrical heads (such as ISO 4762 / DIN 912), countersunk heads (such as DIN 7991), flat heads, etc., suitable for different installation requirements (such as countersunk heads used in scenarios where flush surfaces are required).
  • Thread type: Full thread or half thread, with various materials and surface treatments.
Materials and Surface Treatment
Common Materials
  • Carbon steel (e.g. Grade 8.8, 12.9): High strength, used in machinery and automobiles.
  • Stainless steel (304 / 316): Corrosion-resistant, suitable for outdoor and medical equipment.
  • Titanium alloy: Lightweight, high corrosion resistance, used in aerospace.
Application Scenarios
  • Industrial field: Machine tools, molds, automation equipment (high-strength connections that require frequent disassembly).
  • Automotive / Aviation: Engine components, chassis (high temperature resistance, vibration resistance).
  • Consumer electronics: Laptops, cameras (precision small-sized screws, such as M1.6).
  • Furniture / Bicycle: IKEA furniture assembly, bicycle brake system (countersunk anti-scratch).
Usage Tips
  • The wrench should be fully inserted into the bottom of the hole to avoid sliding teeth caused by oblique force.
  • When pre-drilling, countersunk screws need to match the taper (such as 90°).
  • Regularly check the torque (using a torque wrench) to prevent over-tightening or loosening.
Hexagonal socket screw details
Frequently Asked Questions
Q What is the difference between a hexagonal socket screw and a regular screw?
A Hexagonal socket screws feature an internal hex drive recess on the head, requiring an Allen key for installation. This design allows for higher torque application and a flush or recessed installation.
Q What grades are available and what do they mean?
A They are available in grades 4.8, 8.8, 10.9, and 12.9, indicating tensile and yield strength. Grade 12.9 is the strongest, ideal for high-stress applications like automotive engines.
Q Which material should I choose — carbon steel or stainless steel?
A Choose carbon steel (Grade 8.8/12.9) for strength in industrial machinery. Opt for stainless steel (304/316) for superior corrosion resistance in outdoor or medical environments.
Q What does YZP surface treatment mean?
A YZP stands for Yellow Zinc Plating. It provides a protective zinc coating to improve corrosion resistance and gives the screw a distinctive yellow finish for industrial use.
Q Are free samples available before placing a bulk order?
A Yes, free samples are available to help you verify dimensions, material grade, and surface treatment to ensure the product meets your exact application needs.
Q What standards do these hexagonal socket screws conform to?
A These screws conform to international DIN and ISO standards (e.g., ISO 4762, DIN 912, DIN 7991), and production follows ISO 9001 quality management protocols.

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