Great cap, easy to install and lots of holes for safety wire.

We installed an Electronics International tachometer in a plane that we are rebuilding. We wanted to be certain that dirt couldnt enter through the now unused flex-cable drive so we ordered one of these caps. It is beautifully made and fits great. The only surprise was that EI provides a cap for this purpose. It isnt nearly as nice but would have done the job.

Item arrived and was as advertised. Good quality and the AS price was the best I could find, and the part/pricing WAS hard to find - everywhere but here at AS. That said, this is a simple part and should not cost $20.00.

The one we received was made from anodized aluminum. Very nicely manufactured and finished.

Good news: Nice clean way to seal off that tach drive boss on a Lycoming when you are not using it to drive your tachometer. Bad news: its quite expensive for a plastic molded part! It does have an o-ring seal in it to prevent oil leakage and lots of holes to safety-wire it.