Abstract: A clasp is provided that is fixed to one end of a chain or similar device and includes an internal latch mechanism for releasably engaging the free end of the chain, wherein the latch mechanism includes a spring biased, deflectable member carrying a lug that (when the chain is tensioned across the clasp) deflects to a position adjacent the clasp casing wherein the lug seats in a depression formed in the casing interior to more securely engage the free end of the chain.