A locking pin is provided for detachably connecting a bucket to a backhoe loader. The locking pin comprises a shaft member having an enlarged head portion and an axial bore extending partially therethrough. Spring loaded plunger means are disposed in the axial bore. A planar retaining member is pivotally mounted to the enlarged head portion of the shaft member. The retaining member includes an omega-shaped clasp portion which extends generaly perpendicular therefrom and which is operative with the spring loaded plunger means to lock the pin.