The lock has a holder with an eye (1) and a keeper tongue (2). The holder can have a tongue with a bore forming the eye. The keeper tongue can have a threaded shank with an eye. A tubular nut (3) can be mounted on the shank, if the eye of the holder is attached to the shank. A spring pin (4) can fit into a bore of the threaded shaft to lock the nut in place.
