Abstract: A turn buckle 10 that forms part of a stay of the mast of a sailing craft. The turn buckle 10 includes a cable attachment 12 that is fixed to a stay cable, and a threaded rod 14 to be attached to the boat hull. A turn member 16 is threadably attached to the rod and has fixed to it a bearing cap 18. The bearing cap 18 faces a bearing block 20 fixed to the cable attachment 12, while rotatable bearing elements 21 are located between the cap 18 and bearing block 20 to provide for relative rotation between the turn member 16 and attachment 12 to enable tensioning of the cable.