Prevailing torque or material additive fasteners work by wedging the fastener into close proximity with the mating thread, causing a metal-to-metal drag in the circumferential direction directly opposite to the material locking device.
The material used to produce the wedge customarily is an engineered plastic, although a metal wedge can be used for highly demanding applications.
The shape of the torque feature is critical. The dimensions are designed to ensure a ‘lead-in’ and to provide a uniformly gradual development of locking torque as the mating threads impress their thread form in the prevailing torque feature material.
The Anochrome Group is able to offer two versions of the prevailing feature within their Inlex Locking facility in Wolverhampton. Eslok® 180 and Eslok® 360 both of which use a Nylon 11 material. The former only having a 180 degree patch, whilst the 360 patch goes round the full circumference.
The treated fastener in situ exhibits a high resistance to vibrational effects and its locking material; controlled application process and strong bonding combine to provide the most versatile self-locking system available.