A lock assembly, and wear assemblies including wear parts incorporating the lock assembly, having a locking pin with a dowel extending outwardly that is received in a slot of a retaining member. The slot of the retaining member has a narrowed section which is narrowed to a width that is less than the cross sectional dimension of the part of the dowel that is received in the narrowed section. In use, the locking pin is rotated and the dowel traverses the slot of the retaining member including passing through, or at least being received by, the narrowed section of the slot. The slot may optionally have a seat that receives the dowel after passing through the narrowed section.