A mop includes a mop handle with a grip end and a mopping end. A locking cup is disposed on the mopping end. The locking cup includes a cup portion with interior threads and a locking tooth. A mop head is disposed at the mopping end. The mop head connects to a locking cap. The locking cap includes a locking tab configured to engage with the interior threads of the locking cup to allow for selective removal of the mop head from the mop handle and to engage and be retained by the locking tooth when the locking cap is threaded into the locking cup. A biasing element is disposed in the cup portion and contacts the locking cap and generate a bias between the locking cap and the locking cup and urge the locking tab against the locking tooth when the locking cap is threaded into the cup portion.