Socket Screws

Product Dimensions

ParameterSpecification
Product TypeSocket Screw
Drive TypeInternal Hex (Allen Key)
Size RangeM2 – M36 (custom sizes available)
Material OptionsAlloy Steel, Stainless Steel, Carbon Steel
StandardsDIN 912, ISO 4762, BS 4168, ASTM A574
Surface FinishBlack Oxide, Zinc Plated, Nickel Plated, Hot-dip Galvanized

Industrial Applications

Socket Screws are widely used in:

  • Electrical panels and assemblies: Provide secure fastening in limited space with flush appearance.
  • Automotive industry: Used in engines, suspensions, and parts needing high clamping strength.
  • Aerospace and defense: Ensure reliable fastening in lightweight and high-stress structures.
  • Machinery and equipment: Frequently used in rotating components, jigs, and fixtures for secure joints.
  • Furniture and consumer goods: Offer concealed fastening with a clean look and high durability.

Product Description

Socket Screws, also referred to as Socket Head Cap Screws, feature a cylindrical head with an internal hex drive. This design allows for high torque tightening using an Allen key while ensuring a neat and flush finish. Socket screws are favored in assemblies where space is limited, and external wrenching is not convenient. They deliver excellent strength-to-size ratio, offering secure and durable fastening even in vibration-prone environments. Available in various grades, coatings, and head styles, socket screws are versatile across industrial and commercial uses.

Product specifications

  • Head Type: Cylindrical head with internal hex drive (also available in countersunk, button, and flat head styles)
  • Drive Type: Allen/hex key drive
  • Size Range: Metric M2 – M36; inch series available (from #0 to 1-1/2”)
  • Material Options: Alloy steel (grades 8.8, 10.9, 12.9), stainless steel (A2/A4), carbon steel
  • Surface Finish: Black oxide, zinc plating, nickel plating, hot-dip galvanization, chrome finishing
  • Thread Type: ISO metric coarse/fine, UNC/UNF, BSF, and custom threading available
  • Tensile Strength: Up to 1,220 MPa (grade 12.9 alloy steel)
  • Shear Strength: Approximately 60% of tensile load capacity
  • Torque Capacity: High torque application enabled with internal hex key drive
  • Head Variants: Standard socket head, button head, flat head (countersunk), and low head options
  • Operating Temperature: -50°C to +400°C depending on base material and finish
  • Corrosion Resistance: Excellent in stainless steel and plated variants for marine/outdoor use
  • Applications: Machinery, aerospace, automotive, furniture, equipment assemblies
  • Standards/Compliance: DIN 912, ISO 4762, BS 4168, ASTM A574
  • RoHS/REACH Compliance: Available for specific finishes and stainless steel options

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