what does S signify on your drawings of quarter turns?

The S length helps you determine the Stud length number.

If you measure up this distance then you can calculate the stud length number

S = 16,00 + (0,76 x stud length number). This formula is not valid for every quarter turn, please contact us for the correct formula for your quarter turn.

However this method of reverse engineering does not give you full confidence that the length number is correct.

The best is, if you have a part, then there should be a number on the top of the stud.

If you do not have a part we can go through the calculation with you.

Please tell me more information

-          What is the part number of the receptacle?

-          Which grommet will you use and its part number?

-          What is the plate thickness?

-          What is the frame thickness?

-          How many pieces do you need?

-          Do you need stainless steel parts or is zinc plated fine?