主权项 |
1. A fitting configured to mechanically couple a rod to a post, the fitting comprising:
a first threaded end; and a second unthreaded end coupled to the first threaded end, wherein the second unthreaded end comprises
a first groove and a first O-ring, wherein at least a portion of the first o-ring is located in the first groove, wherein the fitting is configured to enable the rod to slide over the first o-ring, anda second groove and a second o-ring, wherein at least a portion of the second o-ring is located in the second groove, wherein the fitting is configured to enable the rod to slide over the second o-ring. |