Elesa+Ganter GN 912.2 captive socket cap screw.
Captive socket cap screws GN 912.2 can be used to prevent loss of the thumb screw, due to the d3 recessed portion of the stud which is shown in the datasheet.
Depending on the design and required clamping length (a1-a3) of the component being attached, there are a number of assembly options shown in the datasheet.
Material: Stainless Steel AISI 304 (A2)
