Set Screws

Set screws are typically used to fasten two objects together. They are threaded all the way to the head and are fully inserted into the receiving object. Set screws are suitable for use with metal and plastics, but ensure you review our specifications to be certain you are buying fixings suitable for your needs. Our hexagon set screw are recommended for use with our tarmac fixing nut.

About Set Screws

Set screws (also sometimes called set pins, set bolts or grub screws) are important components in mechanical assemblies, securing one part to another without the need for a nut. Instead, the friction between the point of the set screw and the component holds it in place. Set screws don't typically protrude from the component being fastened because the entire screw fits into the threaded hole; this allows for a concealed fit.

Unlike standard screws and bolts, set screws are screwed into a pre-tapped hole. They come in a range of designs, like cup point, flat point and cone point set screws, each offering advantages for specific use cases. Because these screws are typically used within mechanical assemblies, they are usually made from strong materials like steel, stainless steel, or alloy steel, in order to be durable and reliable in different working conditions.

Cup Point

Cup point set screws are the most commonly used type, featuring a concave tip that grips the surface of the mating part. This design provides a strong hold, making them ideal for securing parts that may experience vibrations or slight movements.

Flat Point

Flat point set screws have a flat tip that evenly distributes the holding force across the surface. They are best where minimal surface damage is important, such as securing soft or delicate materials.

Grade 8.8 High Tensile

Grade 8.8 High-tensile steel is our stock's most common and popular form of high-tensile fixing in our stock. It is usually available in plain finish or zinc.

Getting The Best Set Screws For Your Needs

Before choosing the best set screw for your project, consider the following factors to ensure it meets your needs

Material

Our stock of set screws are all built from strong, durable materials in order to be reliable in their use case. This being said, depending on the installation environment, consider screws with additional finishes that are resistant to the environment in which they will be working. For applications exposed to moisture or chemicals, for example, corrosion-resistant stainless steel or galvanised screws provide good protection.

Thread Size

The choice of thread affects the screw's holding power and ease of installation. Ensure the thread type matches your needs and the pre-tapped hole.

Tensile Strength

The tensile strength of a set screw is influenced by factors like its material, hardness and size. This will also affect your fixing’s holding strength. Consider the amount of force your set screw needs to withstand in your use case, and choose from low to high tensile strengths, all of which adhere to ISO 898-1 (or ISO 3506-1 for stainless steel fasteners).

Head Type

Set screws can have a range of heads, including hex socket, slotted, and Torx. The head affects how easy the installation and removal processes are. Hex socket set screws are popular, for example, because they are easy to use and can withstand high torque.

Need help finding the right product?

Give our trained sales team a call on +44 (0)1905 794875, they will help you in choosing a suitable system for your needs and will also be happy to discuss discounts for bulk quantity requirements and special delivery need.

Why buy from Start Safety?

We have the full range shown above in stock on the shelf ready to ship out next day, we offer special delivery services and can even arrange same day delivery on many products.