Patent ID: 7478986

Claim:
A lockable nut system for a threaded steel bar having a central axis down a length of said bar, and further having a non-circular cross-sectional shape with at least one planar side wall, said lockable nut system comprising: a screw threaded nut rotatably engageable on said threaded steel bar; and a tubular locking member slidably engageable on said threaded steel bar, said locking member being adapted in use to resist rotation about said bar, said nut and said locking member being axially non-deformably engageable, said engagement occurring using an extending member and an opening shaped to generally accept the extending member, further wherein said extending member extends in a direction generally parallel to said central axis of said threaded bar, engagement occurring without rotating said extending member and without rotating said opening shaped to generally accept said extending member, whereby in use said locking member resists rotation in at least one direction of said nut on said bar, and further wherein said locking member has a non-circular cross-section aperture wherein said non-circular cross-section consists of at least one interior planar side wall and is generally complementary to said non-circular cross-sectional shape of said bar wherein said bar consists of at least one planar face extending longitudinally of said bar.