A trocar assembly (100) that includes a trocar (102) and a seal cartridge (104) configured to be releasably coupled to the trocar. The seal cartridge includes a top cap that includes a main body and a latch ring. The latch ring is grounded to the main body at a first angular position and has a latch (110) located at a second angular position angularly offset from the first angular position. Applying a radial load on the latch (110) causes the latch ring to flex in torsion at an intermediate portion that angularly interposes the first and second angular positions.
