China Socket Head Cap Screw Manufacturer, Supplier, Factory

When it comes to precision fastening solutions, socket head cap screws are a top choice for engineers and manufacturers. These high-strength fasteners feature a cylindrical head with a hexagonal socket, allowing for efficient torque application and a sleek, low-profile design. For applications requiring a flush surface finish, consider our Countersunk Head Hex Socket Screw, which is ideal for aerospace and automotive assemblies. Similarly, our Hexagonal Socket Head Cap Screw offers exceptional durability for heavy-duty machinery and construction equipment. If you need a fastener that combines the benefits of a countersunk head with a hex socket drive, our Hex Socket Countersunk Head Screws provide a secure, tamper-resistant fit for various industrial applications.


The Socket Head Cap Screw is engineered to meet stringent industry standards, ensuring reliability and performance in critical environments. These screws are manufactured from high-grade materials such as alloy steel, stainless steel, and titanium, providing excellent resistance to corrosion, wear, and high temperatures. Key specifications include a wide range of thread sizes, from #0 to 1 1/2 inches, and lengths tailored to specific application needs. The precision-machined hex socket allows for easy installation with standard Allen wrenches, minimizing the risk of stripping and ensuring a tight, secure fit. Below are the detailed product parameters presented in both a list and a table format for your reference.

  • Material: Alloy Steel, Stainless Steel (304 & 316), Titanium
  • Strength Grade: Grade 8.8, 10.9, 12.9 (Alloy Steel); A2-70, A4-80 (Stainless Steel)
  • Head Style: Cylindrical with Internal Hex Drive
  • Drive Type: Hex Socket (Allen)
  • Thread Type: Metric (Coarse and Fine), UNC, UNF
  • Surface Finish: Black Oxide, Zinc Plated, Plain, Passivated
  • Standards: DIN 912, ISO 4762, ASTM A574
  • Temperature Range: -50°C to +300°C (dependent on material)
Size (Diameter x Length) Thread Pitch Socket Size Head Diameter Head Height Proof Load (MPa, min)
M3 x 0.5 x 10mm 0.5mm 2.0mm 5.5mm 3.0mm 830
M4 x 0.7 x 16mm 0.7mm 2.5mm 7.0mm 4.0mm 830
M5 x 0.8 x 20mm 0.8mm 3.0mm 8.5mm 5.0mm 830
M6 x 1.0 x 25mm 1.0mm 4.0mm 10.0mm 6.0mm 830
M8 x 1.25 x 30mm 1.25mm 5.0mm 13.0mm 8.0mm 830
M10 x 1.5 x 40mm 1.5mm 6.0mm 16.0mm 10.0mm 830
1/4" x 20 x 1" 20 TPI 3/16" 0.375" 0.250" 120,000 psi
3/8" x 16 x 1.5" 16 TPI 5/16" 0.5625" 0.375" 120,000 psi
1/2" x 13 x 2" 13 TPI 3/8" 0.750" 0.500" 120,000 psi

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