How often can an APM self-sealing fastener (screw, bolt, nut) be used?

The APM design and patent (U.S. patent no. 3,175,454) was conceived to generate highpressure fastener sealing and maximum multiple usage. However, this frequently asked question cannot be answered with a simple number, because each application condition is different in terms of reinstallation frequency, in combination with environmental and operating conditions.

Because of the asymmetrical annular design, minimum O-Ring friction occurs producing minimum wear which results in maximum reusability. Repeat orders from many customers confirm satisfaction from field servicing using these fasteners. More.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.