About This Item: Fitment: Fuel System Coupler Fitting Tool Fit for Detroit Diesel S60, Cummins, Caterpillar, MBE900, MBE4000 Engines. Strong Compatibility: Fuel System Coupler Fitting Tool Fit for Detroit Diesel S60, Cummins, Caterpillar, MBE900, MBE4000 Engines. Product Specifications: 1/4 inch NPT Male Threads, 13/16 inch Hex Size. Directly Replacement for OTC5869-1 and for Kent-Moore J-47912-QC 5869-1. Fast and Secure Connection: .