Have used screws with great success - simple, inexpensive and effecive, especially if the hatch is infrequently opened.

Can use a #4 or 6 machine screw (flathead into a countersunk hole is cool) into a T nut mounted on a small bracket installed at the aft edge of the compartment... screw's position will remind you immediately if the hatch is secured or not.. Make screw captive in the hatch by placing a washer on the screw under the hatch and wrapping several turns of thread on the screw below the washer and CA'ing it in place.


Jim