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China Hexagon Socket Head Cap Screw Manufacturer, Supplier, Factory

When you need robust, reliable fastening solutions for demanding applications, our premium-grade Socket Head Cap Screw collection offers unparalleled performance. Engineered for superior strength and precise installation, these screws are a cornerstone of modern mechanical assembly. For applications requiring a specific internal drive geometry, our Hexagonal Socket Head Cap Screw provides exceptional torque transfer and a streamlined profile, minimizing protrusion in tight spaces. Furthermore, when enhanced manual grip is a priority without compromising the socket drive, the Hexagon Socket Head Cap Screws-Knurled Head variant offers the perfect combination of tool-driven power and hand-adjustable convenience.


The Hexagon Socket Head Cap Screw is meticulously manufactured to meet and exceed international standards, ensuring consistent quality and dimensional accuracy. Its design allows for high clamping force and is particularly effective in applications with limited clearance. We offer a comprehensive range of materials, finishes, and size configurations to suit virtually any industrial requirement, from heavy machinery and automotive systems to precision electronic enclosures.

Key Specifications

  • Drive Type: Internal Hexagon (Hex Socket)
  • Head Style: Cylindrical Head with Domed Top
  • Thread Type: Metric (M), Unified (UNC/UNF), or as specified
  • Point Style: Flat, Cup, or Dog Point
  • Standards: DIN 912, ISO 4762, ASTM A574

Material & Mechanical Properties

Material Grade Tensile Strength (Min) Yield Strength (Min) Hardness Common Finish
Alloy Steel, Grade 8.8 800 MPa 640 MPa HRC 22-32 Plain, Zinc Plated, Black Oxide
Alloy Steel, Grade 10.9 1040 MPa 940 MPa HRC 32-39 Zinc Plated, Geomet, Phosphate
Alloy Steel, Grade 12.9 1220 MPa 1100 MPa HRC 39-44 Zinc Flake, Phosphate & Oil
Stainless Steel A2-70 700 MPa 450 MPa HRB 70-85 Passivated

Standard Size Chart (Metric Series - DIN 912 / ISO 4762)

Nominal Size (d) Pitch (Coarse) Head Diameter (dk) Head Height (k) Socket Size (s) Thread Length (b)
M3 0.5 5.5 mm 3.0 mm 2.5 mm 12 mm
M4 0.7 7.0 mm 4.0 mm 3.0 mm 14 mm
M5 0.8 8.5 mm 5.0 mm 4.0 mm 16 mm
M6 1.0 10.0 mm 6.0 mm 5.0 mm 18 mm
M8 1.25 13.0 mm 8.0 mm 6.0 mm 22 mm
M10 1.5 16.0 mm 10.0 mm 8.0 mm 26 mm

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