OTC's 5869-1 Fuel System Coupler Fitting connects to a "compu-check" quick-connect fitting. Applications include Detroit Diesel S60, MBE900, and MBE4000 engines. Specifications: 1/4 inch NPT male threads; 13/16 inch hex size; rugged, plated steel construction with knurling for extra grip. Similar to J-47912-QC. Made in the USA. Value is at the core of the OTC tool and equipment portfolio. Whether it's a simple repair or the most complex drivability concern, these award-winning tools universally solve problems faster, and at better value, than any other product line available. Whether it's a specialty tool or unique piece of service equipment, OTC provides top solutions to modern automotive service challenges while increasing technicians' productivity and shop profits.