A 3/4-inch dimension equals 19.05 mm. Confirm whether a grommet-plug listing uses that measurement for the mounting hole or another feature.
A blind plug closes an unused opening, while an open grommet provides a cable passage. Check the product drawing, panel-thickness range and retaining profile to select the correct type.
Do not substitute a panel plug for a pressure-rated pipe seal or a load-bearing furniture foot without a suitable specification. Choose the compound for the environment and verify retention and any required sealing in the actual assembly.
