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LET-LOK Tube Fitting Mechanisms

The HAM-LET Group has been leading the market since 1950 with its superior-quality, leak-tight LET-LOK® tubing for every type of application. In fact, the LET-LOK® brand offers the most advanced system available on the market meeting the increasing demand for these devices.

What’s LET-LOK®?

LET-LOK® comprises an extensive array of industrial-standard mechanisms and are offered in a range of materials. This, plus their cutting-edge technology, make them efficiently grip and seal tubing for every type of industrial application. They are also tailored to function in high-pressure and severe settings.

Industry experts have poured decades of time and effort in researching, designing, producing and manufacturing LET-LOK® systems resulting in a product that is able to meet the demand for fittings that can endure high-pressure, high-performance, and vacuum environments, such as power, nuclear, fluid, petrochemical, electronic, and other strategic industrial settings.

The Inner Workings of the LET-LOK®

LET-LOK® connectors are ahead when it comes to ease-of-use and assembly. One simply inserts the tube into the whole assembly until the tube bottoms-out against the fitting body. Then, by rotating the nut clockwise, the resultant mechanical force drives the two ferrules forward between the nut and the fitting body. The posterior ferrule is pushed against the anterior ferrule’s tapered back and the anterior ferrule is forced into the tapered mouth of the body. The posterior ferrule is radially swaged inwards on the tube raising the anterior ferrule out to form a full-faced seal on the tapered surface of the body. Lastly, the 11/4 and 3/4 turn (depending on the size) of the nut from the hand-tight position, guarantees flawless drive of all the sealing components. This provides supplementary reassurance that the seal will survive high-pressure and ultra-high vacuum environments.

Guaranteed Safety

HAM-LET provides clients with plentiful material and tips to help them choose the right LET-LOK® product for their application to guarantee maximum outcomes as well as safety and security. For example, it’s highly commended that those in the gas industry select tubing with a larger wall thickness for amplified safety in addition to competence. It is not only vital to choose connectors that meet one’s specific requirements, but to install, work and preserve them correctly. To also ensure personal safety, select a connector taking application details, material compatibility, and product ratings into consideration.

For HAM-LET, safety is a critical factor and each LET-LOK® tubing system has undergone — and passed — austere tolerance tests, including those for impulse, temperature, high-pressure, vibration, and vacuum. The fittings are designed according to severe standards with advanced computerized automation proving them to be strong enough to endure all vigorous conditions. Furthermore, their geometry and mechanical advantage enable them to remain leak-tight.

HAM-LET goes one step further to guarantee customer satisfaction and safety by backing its fittings with a promise of extreme quality-control standards and expert craftsmanship!


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