Socket Screws

Socket screws, also known as Allen screws, socket drive screws, or hex socket screws, are threaded fasteners designed for use in applications where space is limited or a flush surface is required.They are used when externally wrenched fasteners are not practical because of a lack of space. Socket screws are tightened using an Allan or Hex key.

RS NZ offers an extensive range of high-quality threaded fixings with standard metric threads and UNC (Unified National Coarse) threads.

Types of Socket Screws

Hex Socket Cap Screws

• Hex socket cap screws feature a cylindrical head with a high, vertical side. The head height is typically equal to the shank diameter. They are designed for applications in NZ where clearance is limited, offering a strong, reliable fastening solution in tight spaces.
• Head Shape: Socket cap screws have a head height equal to the shank diameter. They are used instead of a hex bolt when there is less clearance available.

Hex Socket Button Screws

• Hex socket button screws have a low, rounded head, providing a clean and finished appearance. Their wide head diameter distributes clamping force over a larger area, making them suitable for thin materials and applications requiring a smooth surface.
• Head Shape: Hex socket button screws have a larger head diameter making them more appropriate for holding thin materials such as sheet metal guards.

Hex Socket Countersunk Screws

• Hex socket countersunk screws, also known as flat head socket screws, are designed to sit flush with or below the surface of the material. This creates a smooth, unobtrusive finish, ideal for applications where aesthetics or clearance are critical.
• Head Shape: Hex socket countersunk screws are used when you need a screw to fit flush or below the surface of your material.

Hex Socket Shoulder Screws

• Hex socket shoulder screws, also called stripper bolts, have a cylindrical head with a precisely ground shoulder. They are commonly used as pivot points or axles in mechanical assemblies due to their tight tolerances and ability to provide accurate alignment.
• Head Shape: Hex socket shoulder screws are often used as a pivot point or axis because shoulders are ground to a tight tolerance. They feature a small cylindrical head with tall vertical sides.

Materials used

Our socket screws are available in a range of materials to suit every application and environment. They include:

• Stainless Steel, including 316 and 304 grades: Stainless steel offers excellent corrosion resistance, making it ideal for applications exposed to moisture, chemicals, or harsh environments. 304 stainless steel is a general-purpose grade, while 316 stainless steel provides enhanced corrosion resistance, particularly in marine or chemical processing applications.
• Steel: Steel socket screws offer high strength and durability, suitable for heavy-duty applications. They are often treated with coatings like zinc or black oxide to improve corrosion resistance.
• Brass: Brass socket screws are chosen for their corrosion resistance and electrical conductivity. They are commonly used in electronic applications and decorative applications due to their aesthetic appeal.
• Titanium Alloy: Titanium alloy socket screws offer an exceptional strength-to-weight ratio and excellent corrosion resistance. They are used in high-performance applications such as aerospace and medical devices where weight and durability are critical.

Key Considerations Factors When Choosing Socket Screws

When selecting socket drive screws, several factors must be carefully considered to ensure optimal performance and reliability in your application in NZ.

• Head Shape: Determines the screw's application and aesthetic. Cap screws are for tight clearances, button screws for a smooth finish, countersunk screws for flush mounting, and shoulder screws for pivot points.
• Material Compatibility: The material of the socket screw must be compatible with the materials being joined and the operating environment.
• Thread Size and Pitch: Thread size (diameter) and pitch (threads per inch or mm) must match the tapped holes or nuts being used.
• Length and Diameter: The length of the socket screw must be sufficient to provide adequate engagement with the threads, while the diameter must match the hole size.

Applications of Socket Screw

Socket screws are found in a wide range of applications and industries. Machinery can often be found to have socket screws in their construction along with many industrial and engineering applications:

• Machine Assemblies: Essential in machine assemblies due to their high strength and precise fastening capabilities. Used to secure components, ensuring stability and reliability.
• Die Casting: Used to assemble and secure molds and tooling. Their ability to withstand high clamping forces and temperatures makes them ideal.
• Clamping Components: Widely used in clamping components, such as jigs and fixtures, to provide adjustable and secure holding forces.
• Industrial Machinery: Integral to industrial machinery, from heavy-duty equipment to precision tools, ensuring longevity and performance.
• Electronics: Used in applications where space is limited and precise fastening is required, such as circuit boards and enclosures.

Find the Perfect Socket Screws for Your Project Needs

RS NZ is a trusted supplier and distributor of high-quality socket screws from leading brands like RS PRO, Parker, and Phoenix Contact.

We offer an extensive selection of socket screws, tool boxes, and cable strippers to meet diverse project requirements. Explore our comprehensive online catalog to discover the ideal product for your application or next project.

Ordering & Delivery Information for NZ

To place an order with RS NZ, simply browse our extensive online catalog, select the desired socket screws or related products, and proceed to our secure checkout. We offer a variety of payment options to ensure a convenient purchasing experience.

For comprehensive details regarding our delivery services, including estimated delivery times and applicable costs within New Zealand, please visit our dedicated Delivery Information page. We are committed to providing prompt and reliable delivery to support your project timelines.