The New Holland 81819964 is a genuine OEM hex head plug designed for a wide range of New Holland agricultural and construction equipment. This essential component ensures proper sealing and functionality within hydraulic or fluid systems. Featuring a 1/4 NPT thread, it provides a secure and reliable fit. Confirmed applications include numerous New Holland tractors, combines, balers, forage harvesters, skid steer loaders, telehandlers, wheel loaders, backhoe loaders, and excavators, ensuring broad compatibility across the brand's machinery.