571.GR40 — Automann 4" Round Light Grommet

The Automann 571.GR40 is a black rubberized-vinyl mounting grommet designed to secure standard 4-inch round sealed lamps in commercial truck and trailer lighting assemblies. Its flexible construction holds the lamp firmly in the mounting opening while helping absorb road vibration and reduce movement that can contribute to premature lamp damage. The open-back design provides access to the lamp wiring and supports flush-mounted installations for compatible round stop, turn, tail, and backup lights. It fits a nominal 4-inch round lamp in a panel opening of approximately 4½ inches; verify the panel thickness and lamp dimensions before installation. 

Technical Specifications

• Manufacturer: Automann

• Part number: 571.GR40

• Part type: Light mounting grommet

• Color: Black

• Material: Rubberized vinyl / flexible polymer

• Lamp size: 4-inch round sealed light

• Required panel opening: Approximately 4½ inches

• Design: Open back

• Mounting style: Flush mount

• Function: Retains the lamp and helps cushion vibration

• Applications: Commercial trucks, trailers, and compatible vehicle lighting

• Cross-references: Truck-Lite 40700, Grote 91740, Peterson 426-18, Optronics A45GB, Maxxima M50400-B

• Package quantity: One grommet unless otherwise specified