Unthreaded fastener

Known as ‘Spirotite’, the fastener offers the advantages of threaded fasteners – without the disadvantages of the thread. Unlike threaded fasteners, which can work loose under vibration and also makes maintenance difficult, Spirotite fittings work on compression so the more vibration, the tighter the fitting.

Spirotite fittings are also claimed to be more effective than a traditional ‘nut and bolt’ system, which the company say are less secure, less durable and can easily become loose.