Converts o-succinylbenzoyl-CoA (OSB-CoA) to 1,4-dihydroxy-2-naphthoyl-CoA (DHNA-CoA). 2-succinylbenzoyl-CoA + H(+) = 1,4-dihydroxy-2-naphthoyl-CoA + H2O kcat is 14.9 min(-1) with O-succinylbenzoyl-CoA at 25 degrees Celsius and pH 7.0 (PubMed:12909628). kcat is 4620 sec(-1) with O-succinylbenzoyl-CoA at 25 degrees Celsius and pH 7.0 (PubMed:21830810). Quinol/quinone metabolism; 1,4-dihydroxy-2-naphthoate biosynthesis; 1,4-dihydroxy-2-naphthoate from chorismate: step 6/7. Quinol/quinone metabolism; menaquinone biosynthesis. Homohexamer. Dimer of a homotrimer. Belongs to the enoyl-CoA hydratase/isomerase family. MenB subfamily.