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Thread Forming Screws.

Thread Forming Screws

What are Thread Forming Screws?

Thread Forming Screws, also commonly referred to as Thread Rolling Screws, are designed to tap their own threads as they are driven into a pre-drilled hole. The main advantage of these Trilobular Screws is that they can be installed directly into a drilled hole, with no need for thread tapping. These fasteners feature tight, shallow threads, and are optimised for use in malleable metals such as Aluminium.

Trilobular Threads.

The trilobular thread shape of these components is uniquely designed to aid thread cutting and ease radial force during installation. A trilobular thread has three 'lobes' for cutting threads and three recessed relief areas. This feature allows housing material to creep (or cold flow) into these recesses after installation, which also increases resistance to vibration and loosening.

Thread Forming Screw Variants.

Accu's Thread Rolling Screws are available with either pan heads or countersunk heads, and feature Pozi Drives or Hexalobular (Torx) drives.


Thread Rolling Screws are manufactured from A2-70 Stainless Steel as standard, with Chemical Blackening also available.

Bespoke Thread Forming Screws Manufacture.

High precision, bespoke manufacture of Thread Forming Screws to customer specification. State of the art facilities specialising in both small batch prototyping and large scale manufacture.

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