What is Moeller Click-Loc™ self-locking technology?

It is an external secondary locking feature which provides an enhanced reliability and maintainability alternative to lockwire, tab washers, cotter pins, de-formed threads, locking elements, or thread lock compound (e.g., “Locktite”).

What is it made from?

The standard material is Inconel 718.

How does it work?

As the component is assembled, the Click-Loc engages during the last two turns prior to seating. Once engaged, the flexible beam fingers of the lockring act against the detent cam of the mating part to provide a prevailing torque which is sufficient to prevent loosening from all tested applications.

Where is it used?

Most applications are critical components on aerospace products, including fuel line coupling nuts, borescope plugs, drain plugs, pylon locks, adjustable mechanical linkages, and engine mounts.

Who are the present users?

Products that use Click-Loc include such industry leaders as GE Aircraft Engines, Pratt & Whitney, Rolls-Royce, Honeywell, Boeing, Lockheed Martin, Safran, the U.S. Air Force, the U.S. Navy, and many more. Click-Loc has been used in commercial and military aircraft and other applications since 1993.

Is it reuseable?

Click-Loc has demonstrated 100+ cycle reusability in applications up to 600°F and 50+ cycles from 600°F to 1200°F. Generally, Click-Loc reusability exceeds the service life of the component in which it is installed.

Can Click-Loc be retrofitted to my present hardware?

YES! Self-locking drop-in replacement plugs can be used to replace or dual source the existing plug if the mating port is already designed. Retrofit fluid fittings are designed for existing fluid fittings.

We are experiencing leaking fittings. Will Click-Loc fix this?

If the leaking fittings are associated with loose coupling nuts, Click-Loc will fix it.

Does Click-Loc change the fitting torque?

No. The Click-Loc adds some prevailing torque during the last two turns immediately before seating.

Can Click-Loc be used with all types of materials?

Yes. Click-Loc is made from Inconel 718. Retrofit kits can be applied to couplings made of virtually any material.

Does Click-Loc require any unique maintenance procedures?

No. As with other fluid fittings, plugs, and fasteners, Click-Loc products may be lubricated before tightening, but this is not required.

Do retrofit kits change the wrench sizes?

Yes. Generally, a 1/16″ larger size must be used.

How can I verify Click-Loc is installed correctly?

Since Click-Loc can only be installed one way, once the primary device is torqued correctly, the Click-Loc secondary locking device will be locked in place automatically. Generally, the Click-Loc will also produce a noticeable clicking sound as well. Click-Loc provides secondary retention in the event the primary device is compromised.

Will Click-Loc still work if exposed to oil or dirt?

Yes. Dirt, carbon buildup, and other contaminants do not significantly affect performance.

How is Click-Loc retained on the mating parts?

New components are typically retained by a controlled interference fit, sufficient to provide a safety margin over the maximum forces that could be expected. Retrofit components are generally sleeves that snap in place.

How reliable is Click-Loc?

Reliability data has been tracked. It is measured in the hundreds of millions of component flight hours.

Learn how Click-Loc surpasses the ease, reliability, and reusability of other secondary locking devices.

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