V-LOK Stay Tight Nuts

V-LOK nuts consist of two parallel crests next to each other on the same ridge. These two crests induce double contact lines (locking points) between threads when paired with standard bolt threads. They maximize the static friction force between the bolt and nut threads and prevent loosening.

V-LOK prevents bolts and nuts from loosening due to mechanical impact or vibrations, including Aeolian vibrations, thermal expansion due to thermal load cycling, overheating of joints, expansion due to corrosion etc.

Principle of V-LOK

The screw thread of V-LOK consists of two tangential parts (the first and second tangential parts) to induce double-contact point locking with the other object with a common screw thread. It maximizes the friction force between the bolt and nut screw threads through double-contact points and performs an anti-loosening function.

How They Work

V-LOK components don’t depend on pressure, they rely on strong static friction that is initially created by the double contact lines between the threads. The dual contact lines (crests) double the already strong static friction, which is the key. Secondly, these two ‘parallel static frictions’ interact and interlock with each other, which further prevents loosening. It means that if one contact line of the two shows slightly reduced static friction the other contact line will still maintain a strong static friction and prevent loosening. In other words - it is highly unlikely that both contact lines would reduce or lose the strong static friction at the same time.

Perfect solution for any situation where a nut is used; i.e steel support structures, crossarm braces, insulator pins, suspension clamps etc.

Benefits

• Improved reliability (SAIDI, SAIFI) and resilience
• Improved public and personnel safety
• Reduced energy losses due to bad connections
• Reduced losses and damage to property due to unnecessary electrical and mechanical failures
• Reduced likelihood of bush fires
• Significant cost savings on maintenance and preventable faults
• Positive environmental effect
• V-LOK nuts are reusable
• No need for special tools making them faster and more cost effective
• Can be used in both electrical and mechanical connection