Abstract: This invention is an improved bolt containing a light bulb. It comprises a threaded shank having a head at one end. The shank is formed with a longitudinal passageway therethrough. The head of the bolt is also provided with a passageway extending from a side thereof to the longitudinal passageway. A light bulb is inserted in the longitudinal passageway and positioned at the one end thereof to emit light through the passageway provided in the head. Wire leads connecting the light bulb to supply the electric energy thereto extend from the other end of the longitudinal passageway.