The LiftMaster 19-3400-NP is a genuine replacement #40 roller chain engineered for LiftMaster chain-driven systems. Designed to transmit drive power from the operator sprocket to the gate or door mechanism, this nickel-plated chain offers enhanced corrosion resistance for outdoor and high-moisture environments. Labeled “NO ML,” it ships without a master/connecting link. It is intended for use on compatible LiftMaster slide gate operators and select commercial door operator applications that specifically call for #40 chain.
As a service part, the 19-3400-NP supports reliable operation when repairing or rebuilding chain-driven assemblies on residential or commercial installations. Installers should cut the chain to the required length and secure it using a proper #40 connecting link (purchased separately), then set correct tension and alignment per the operator’s manual. Regular lubrication and periodic inspection are recommended to reduce wear. For safety, disconnect power and follow lockout/tagout procedures before servicing, and verify that the equipment you are maintaining specifies #40 chain. This replacement chain is ideal for LiftMaster gate operator repairs, upgrades, and maintenance where a nickel-plated #40 chain is required and a master link is not included.