The 4002 series Camlocs are designed to be used with a metal grommet to help spread the attachment forces. The Large Diameter ("Plus Flush Oversize") Grommet is recommended for soft materials such as fiberglass. This grommet stands out 0.050" from the front of the panel. Mounts in panels up to 0.090" thick. Counter-bore or spot-face the back of thicker panels to install these grommets.
Note: This grommet adds 0.050" to the total grip length of the assembly. Be sure to add this amount to your total grip length calculation when determining the proper stud length. Requires a minimum 0.116 inch total grip thickness.