M24308/23-9Z "Z" suffix callout

M24308/23-9Z is a Mil-Spec part number. Regardless of the manufacturer that is making the part, the part structure would be the same.

The “Z” suffix on the end calls out ZINC plating. This information is listed at the bottom of the TE Connectivity product page here https://www.te.com/usa-en/product-1757830-3.html