Stainless Steel 304 Hexagon Socket Set Screws with Cone Point Hex Socket Grub Screw

설명

What Are Hexagon Socket Set Screws?

Hexagon socket set screws, also known as Allen set screws, are a type of fastener designed to secure an object within or against another component. Unlike standard screws, set screws are typically headless and feature a hexagon (Allen) socket drive, allowing them to be tightened or loosened using an Allen key or hex wrench. They are commonly used to prevent relative motion between two rotating parts, such as securing a pulley or gear onto a shaft.

Materials of Hexagon Socket Set Screws

Hexagon socket set screws are manufactured from various materials to suit different mechanical and environmental requirements. Common materials include:

• Carbon Steel (Grade 8.8, 10.9, 12.9) – Offers high strength and durability for general-purpose applications.

• Stainless Steel (A2-304, A4-316) – Provides excellent corrosion resistance, making it ideal for marine, chemical, and food-processing industries.

• Alloy Steel (AISI 4140, 4340) – Used in high-stress applications due to its toughness and wear resistance.

• Brass – Offers good corrosion resistance and electrical conductivity, often used in plumbing and electrical applications.

• Titanium – Lightweight yet strong, used in aerospace and medical applications where weight and corrosion resistance are critical.

Surface Treatments

To enhance performance and longevity, hexagon socket set screws often undergo surface treatments, including:

• Black Oxide – Provides mild corrosion resistance and reduces light reflection.

• Zinc Plating (Electro-galvanized) – Improves corrosion resistance and offers a shiny finish.

• Hot-Dip Galvanizing – A thicker zinc coating for harsh environments.

• Phosphate Coating – Enhances lubrication retention and wear resistance.

• Nickel Plating – Offers superior corrosion and chemical resistance.

• Dacromet (Geomet® Coating) – A non-electrolytic zinc flake coating for extreme corrosion protection.

Specifications

Hexagon socket set screws come in various sizes, thread types, and point styles to accommodate different applications. Key specifications include:

• Thread Size: Ranging from M1.6 to M24 (metric) or #0 to 1″ (imperial).

• Length: Typically from 2mm to 100mm, depending on the application.

• Drive Size: Hex socket sizes (e.g., 1.5mm, 2mm, 2.5mm, 3mm, etc.) corresponding to the screw diameter.

• Point Styles:

  • Cup Point – Most common, provides strong grip.

  • Flat Point – Used when minimal surface damage is desired.

  • Dog Point – Extended tip for precise alignment.

  • Knurled Cup Point – Enhances grip on smooth surfaces.

  • Oval Point – Reduces surface pressure for delicate materials.

Application Fields

Hexagon socket set screws are widely used across industries due to their reliability and compact design. Common applications include:

• Machinery & Automotive: Securing gears, pulleys, and bearings onto shafts.

• Electronics: Fastening components in devices where a low-profile fastener is needed.

• Aerospace: Used in aircraft assemblies due to their high strength-to-weight ratio.

• Medical Devices: Titanium set screws are used in implants and surgical instruments.

• Construction & Furniture: Used in structural joints and adjustable fittings.

• Robotics & Precision Engineering: Ensuring precise alignment in high-tolerance mechanisms.

Excellent Case: Securing a Robotic Arm Joint

Scenario:

A robotics manufacturer was designing a high-precision robotic arm for industrial automation. The arm required a secure connection between the servo motor shaft and the joint linkage to prevent slippage during rapid movements. Traditional fasteners like bolts and nuts added bulk and risked loosening under vibration.

Solution:

The engineers opted for M6 x 12mm stainless steel hexagon socket set screws with cup points (A2-304 grade). The screws were installed into pre-tapped holes on the linkage, pressing firmly against the motor shaft’s flat surface (known as a “D-cut” shaft).

Outcome:

• No Slippage: The cup point dug into the shaft, ensuring zero movement even under high torque.

• Space-Saving: The headless design allowed for a compact joint assembly.

• Corrosion Resistance: The stainless steel material resisted oxidation in a humid factory environment.

• Easy Maintenance: The hex socket drive allowed quick adjustments using a standard Allen key.

This application demonstrated how hexagon socket set screws provide a robust, low-profile fastening solution in high-performance mechanical systems.

Conclusion

Hexagon socket set screws are versatile fasteners essential in industries requiring secure, compact, and durable connections. With various materials, coatings, and point styles available, they can be tailored to meet specific mechanical and environmental demands. Whether in robotics, automotive, or aerospace, these screws ensure precision and reliability in critical assemblies.