||Whereas articles about the rhetoric of interdisciplinarity abound, empirical evidence substantiating the value of its practices remains limited, at best conflicting. While most studies have focused on the natural and medical sciences, very few studies have focused on the social sciences and humanities. To better understand interdisciplinarity patterns observed in those disciplines, this paper explores how research objects can serve as a bridge between disciplines and specialties in the social sciences and humanities. Our results shows that certain social sciences disciplines, such as economics and management, and, to a lesser extent, education and literature, have objects, concepts and their own methods, that are not shared with other disciplines. In contrast, sociology and history have few specific objects, and are positioned at the heart of the network of undisciplined objects. On the whole, our results suggest that disciplines of the social sciences and humanities are not monolithic blocks and a strong interdisciplinarity is expressed through a wide selection of objects.