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TFC is offering the Smalley Spirolox series of retaining rings. Unlike die-stamped circlips or retaining rings, Smalley Spirolox retaining rings and snap rings are coiled on edge to the exact diameter required.


Smalley Spirolox rings have a uniform cross section and no protruding lugs and are burr free. Smalley Spirolox rings offer a full 360° retaining surface and are directly interchangeable with standard imperial and metric standard circlip grooves.

Made from pre-tempered flat wire, Smalley Spirolox rings are made without the need of expensive tooling by edge coiling, which means, unlike conventional circlips, special designs can be easily accommodated and design changes can be made without any additional cost.

Key features and benefits

  • Spiral wound in multiple turns increases load capacity yet allows easy assembly by hand or as an automated process
  • Uniform radial section provides a pleasant appearance on the assembled product — beneficial when radial clearance is limited
  • Simplified assembly — wind into groove; no special pliers or tools needed to install or remove; removal notch provided for easy removal using a screwdriver
  • Available in a variety of materials including carbon spring steel, 302 and 316 stainless steels, plus exotic alloys such as Inconel, Elgiloy, A286, phosphor bronze and beryllium copper
  • Design flexibility — ring thickness can be changed to accommodate most applications by either varying material thickness and/or number of turns
  • Meets military and aerospace specifications
  • Can be coiled to exact specification in any diameter between 5mm and 2,300mm

TFC Europe Ltd is one of the leading suppliers of technical fastener components to industry, with an unrivalled reputation for delivering innovative products, supply solutions, and exemplary service, to help our customers achieve breakthroughs in product development and productivity.

From the very beginning TFC’s founders in Heathfield, UK were determined to help equipment designers by supplying technical fasteners enabling them to design a better product and to generate more profits for their companies. Half a century later this same approach means that TFC helps not only the designer but also the buyer, and the operations teams by providing a wide variety of fastener and related components via automated and sophisticated supply systems that enable lean manufacturing goals to be met and our customers to improve their profits.

In so doing TFC has become one of the leading fastener distribution businesses in Europe supplying over 3,000 customers, employing over 100 people, working out of a national and European network of logistic service centres as well as being able to support global customers in their manufacturing plants anywhere in the world.

Whether it is a simple threaded bolt or a complex bespoke product made to customer drawing speci¬ cations, our quality assured fasteners are guaranteed to provide the perfect solution to your fastening needs.

– Bolts & Socket Screws in various grades
– Smalley Wave Springs and Spirolox Retaining Rings
– Nuts, Washers, Rivets & Screws of all types
– Sheet Metal Fasteners – self-clinch & rivet bushes
– Circlips, Springs, Keys and Seals
– Threaded Inserts – for plastics, timber & metal
– Electronic Hardware – standoffs, handles, ferrules
– Construction Fixings – anchors, through bolts, resin
– Panel, Wire & Pipe Fasteners
– Machined and turned parts to specification

Supply Chain Services – Our supply chain expertise provides significant benefits to customers by reducing costs associated with the purchase, stockholding and handling of a wide range of low-cost fastening and ancillary items. With a flexible inventory managed system; DLF, Kanban or VMI to reduce the supplier base, minimise inventory, direct to the line quality approved products immediately at hand, customers are able to remove a whole variety of hidden administration and transaction costs.

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