SUB MINIATURE PUSH SWITCH BY APEM
Manufactured by Apem as their part number 9233Y, these are a top quality sub-miniature push switch, normally open so with single pole momentary push to make gold plated contacts, low rating of 0.1A at 30V.
Designed for printed circuit board mounting, could be glued to fix to a front panel, overall dimensions of the body with connections and the mounting bracket is about 19mm and dimensions across the bracket body is 8mm x 6mm diameter.
SUPPLIED AS SHOWN IN THE PHOTO..