A battery module and a method for assembling the battery module are provided. The battery module includes a first end plate, a second end plate, a frame member, a first battery cell disposed between the first end plate and the frame member, and a second battery cell disposed between the second end plate and the frame member. The battery module further includes a first shoulder bolt having a first head portion, a first shaft portion, a first shoulder portion, and a first threaded portion. The first shoulder bolt is disposed such that the first head portion is disposed against the first end plate and the first shaft portion extends through a first aperture of the first end plate and a first aperture of the frame member, and the first shoulder portion is disposed against the second end plate.