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Complete Hardware & Wiring Kit: Supplied with the 4" open-back black rubber grommet and a 16-gauge, 3-wire pigtail wiring harness equipped with a standard PL-3 plug connection.
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Vibration-Dampening Shock Absorbency: Engineered to cradle 4-inch round light heads firmly while absorbing punishing road vibrations, effectively extending lamp longevity.
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Premium Environmental PVC/TPR Blend: Formulated for harsh field applications to resist oil, grease, UV degradation, and extreme temperature variations without cracking or losing elasticity over time.
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Zero Outgassing Material Design: Constructed to eliminate material outgassing, ensuring that no chemical residue clouds or degrades your lens housing over extended service periods.
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Seamless Flush-Mount Installation: Designed to effortlessly snap-fit any standard 4.00-inch diameter circular light head into a standard 4.50-inch panel cutout hole without the need for mechanical fasteners.
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Versatile Cross-Series Compatibility: Perfectly scaled to mount all Truck-Lite 40 Series, Super 40, and 44 Series LED or incandescent lamps, as well as industry-standard 4" round trailer lights.
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Pre-Terminated Fleet Harness: The included 3-wire pigtail harness features a right-angle PL-3 plug on one end and stripped wire ends paired with a pre-attached ground ring terminal on the other for quick electrical integration.
Truck-Lite 40403 – 40 & 44 Series Open Back Black PVC Grommet Mount Kit for 4" Round Lights (PL-3 Connection, Stripped End/Ring Terminal)
Upgrade and safeguard your vehicle’s lighting infrastructure with the commercial-grade Truck-Lite 40403 Open Back Grommet Mount Kit. Specially engineered to accommodate standard 4-inch round lamps, this comprehensive mounting solution is an industry standard for commercial semi-trucks, line-haul trailers, box trucks, delivery vans, and heavy-duty utility vehicles.
This all-in-one installation kit includes two perfectly matched factory components: a premium 4" Open-Back Black Mounting Grommet and a heavy-duty 3-Wire PL-3 Pigtail Wiring Harness. Molded from a high-performance PVC compound containing high-grade thermoplastic rubber (TPR), the mounting grommet is tailored for extreme environmental durability. Its advanced material formulation eliminates chemical outgassing while actively dampening road vibration. By providing this crucial layer of shock absorbency, the grommet insulates your light head from harsh chassis rattles and pothole impacts, which drastically extends internal bulb filament and diode life.