Socket Screws
Socket Screws are high-strength precision fasteners with an internal hex drive, designed for applications that require compact, flush, and vibration-resistant fastening. They are commonly used in machinery, automotive, and engineering applications where high torque and reliability are critical.
| Parameter | Specification |
|---|---|
Product Type |
Socket Screw |
Drive Type |
Internal Hex (Allen Key) |
Size Range |
M2 – M36 (custom sizes available) |
Material Options |
Alloy Steel, Stainless Steel, Carbon Steel |
Standards |
DIN 912, ISO 4762, BS 4168, ASTM A574 |
Surface Finish |
Black 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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