Why is it so hard to close the HHS series with hand operated studs with sealing gaskets?

Why is it so hard to close the HHS series with hand operated studs with sealing gaskets?

We know that the forces to close the sealed version of the studs are quite high.

This is especially the case with hand-operated studs because you can't use a tool with a long handle.

As always, it depends on the client and the application:
What does the customer want when he requires the stud to be waterproof?
There is a wide range of customers that we have had in the past requesting water sealing, from coffee machine manufacturers to submarine builders.
The data we state in our catalog is based on long term reliability and as the seal will have a certain "sealing" behavior like any rubber-like material, the forces will be much lower when you open the fastener after it was closed for several years. .

Conclusion, it is better to test with the length of the table and perhaps also a longer length to see if you can close the quarter turn.
Please also let us know your application and the class you require to advise on the best length.