Confirm the unit and dimension reference for a grommet labeled 1-1/8. If the unit is inches, the measurement equals 28.575 mm.
Check the mounting-hole size, panel thickness, passage and flange clearance. Choose the compound for the actual temperature, fluids and weather exposure; rubber does not perform identically at every temperature.
For custom manufacture, provide a drawing or existing sample and agree on material, hardness, tolerances and appearance. Formulation or color changes need review and verification against the requirements. Confirm sample fit and performance before production rather than assuming any adjustment preserves the original properties.
