Equipment and materials

Abstract

The Quick‐Click system self retaining pin automatically locks in place when it is installed and cannot be removed without a special tool. Designed as replacements for clevis pins with cotter pins or clip rings, a circular C shaped spring is located in a tapered neck at the point end. A finger pressure of 4 or 5 pounds is all that is needed to install the pin and as it enters the hole, the pressure pushes the spring back to the smallest diameter of the tapered‐neck portion of the pin, where it easily compresses to allow the pin to be pushed completely through the hole. As the end of the pin exits from the far end of the hole, the spring expands to larger than hole size. Attempts to push out the pin without the removal tool cause the spring to ride up on the larger end of the tapered neck, where it cannot be compressed. Since it won't compress, it holds the pin firmly in place. Removal force without the special tool is more than 8200lb for the 9/16in. pin and 220lb for the small #10 pin, and is thus virtually tamper‐proof.

Citation

(1973), "Equipment and materials", Aircraft Engineering and Aerospace Technology, Vol. 45 No. 8, pp. 30-32. https://doi.org/10.1108/eb035071