Through its design, Spiralock thread form is resistant to thread loosening and stripping, caused by transverse vibration. By elimination of secondary locking devices (eg, anerobics, washers, etc), ease of assembly, reusability and dependability result, with reduced overall joint costs.

The technology is being applied across many industries, with applications including military aircraft, diesel engines, trucks, automobiles.

Spiralock products include flange nuts, self-clinching nuts, wire thread inserts, threaded inserts, taps and gages, threading inserts and thread milling cutters. Spiralock has re-engineered the standard internal (female) thread form by added a 30° wedge ramp at the root of the thread. This unidirectional thread is precise enough to work with industry standard 6g and 4h (2A–3A) 60° male thread fasteners. The thread design allows the bolt to spin freely relative to the female threads until torque is applied. The crests of the standard male thread are drawn tightly against the wedge ramp, eliminating radial clearances and creating a continuous spiral line contact along the length of the thread engagement. The result is superior vibration resistance, even load distribution, and improved integrity of the threaded joint.

Spiralock of Europe is based in Market Harborough, Leicestershire, UK.

www.spiralock.com