Check your NATO plug

[TD5-90]

My lid was smooth-running right from the start. My dealer checked every little detail before delivery. Even this lid.

Strange. Same dealer, but different experience...

Had to brutally break it open first time. Applied Mike Sanders to the thread several times, better now, but you want to open it every other week to keep it from seizing.

My suspicion is the problem is related to the mounting position. That tilted position allows (salt-)water to accumulate in the threads of the cap rather than to flow out.

 

[drinkmorejava]

If you want to avoid anything too nasty, I would use lanocote, which is a lanolin based product. It's sort of gross and sticky, but that's the point.

 

[Mudnut]

Just don’t use copper slip on aluminium ! Or the aluminium will be eaten away

When I get back in the country, will have to clean it off, and put on something different. Thanks for the heads up

 

[AWo]

Never heard of that product, so I looked at its Safety Data Sheet (AU). It is pretty nasty stuff especially for aquatic life, but I would not want it on my hands, when I can use Tef-Gel instead.

Regarding the offocial and standarized tests no harm for skin and the human body. However, I always use gloves when working with any kind of oil oder chemical products.

AWo