The patented \"C\" insert pre-assembled MegaCrimp coupling gives world-class, leak-proof performance. It is designed with a patented \"C\" insert attached to the ferrule that accommodates hose of different constructions and wall thicknesses. The insert's design ensures crimping forces are evenly distributed to form a concentric seal. The \"C\" insert simplifies inventory requirements since one MegaCrimp coupling size can accommodate various hose outside diameters, on both one- and two-wire braid hydraulic hose. SAE J1926/3 ISO 11926-3 Light-Duty (L Series) Stud End.