Patent ID: 8794679

Claim:
A fitting, comprising: a sleeve having a first end, a second end opposite the first end, and an aperture extending from the first end to the second end; a nut having a first end, a second end opposite the first end of the nut, an aperture extending from the first end of the nut to the second end of the nut, a circumferential interior surface, and a plurality of radially inwardly facing serrations formed on the interior surface proximate to the first end of the nut, wherein the aperture of the nut includes a first interior portion located proximate to the first end of the nut and a second interior portion located proximate to the second end of the nut, the first and second interior portions being separated from one another by a partition; a coil spring having a free first end, and a tab extending outwardly and angularly from a longitudinal axis of the coil spring at the free first end of the coil spring, the tab being a part of the coil spring; and an L-shaped retaining washer, positioned on the sleeve and within the aperture of the nut proximate to the first end of the nut, for retaining the coil spring on the sleeve so as to prevent disengagement of the tab of the coil spring with the one of the plurality of radially inwardly facing serrations of the nut, wherein the first end of the nut is bent inwardly around the washer so as to prevent the retaining washer from disengaging the sleeve, the sleeve being positioned within the aperture of the nut such that the first end of the sleeve protrudes outwardly from the first end of the nut, and the coil spring being mounted around the sleeve and positioned within the first interior portion of the aperture of the nut, and the tab of the coil spring engages one of the plurality of inwardly facing serrations of the nut, the tab of the coil spring being adapted to engage the plurality of radially inwardly facing serrations in a first direction when a predetermined torque is applied to the nut and prevents the coil spring from rotating in a second direction opposite the first direction until another predetermined torque is applied.