This male connector is designed to fit Cummins engines K19 and K38 with NT855. It is a high-quality unit that is perfect for any commercial truck owner looking to replace their existing connector. Made in China, this unit is manufactured with precision and is built to last. The S1039A 3280878 male connector is a great addition to your engine and will ensure a seamless connection. It is easy to install and use, and will provide reliable performance for years to come. This unit is a must-have for anyone looking to upgrade their Cummins engine connector.