Patent ID: 7104742

Claim:
A system for aligning and fastening a fitting to a rail having a tool chamber, said system comprising: a bolt having screw threads at a first end for fastening the bolt to the fitting and having machine threads at a second end; wherein the first end of the bolt is adapted to be screwed a predetermined length of the screw threads into the fitting; wherein the second end of the bolt is adapted to be inserted through a bolt-receiving channel in the rail; a washer having a first convex side, an opposing second convex side having parallel axis of curvature and a central aperture receiving the bolt; wherein the washer is adapted to be inserted through the tool chamber in the rail; and a nut having a generally flat bottom surface screwed onto the machine threads of the bolt, wherein, the flat bottom surface of the nut is tightened against the convex side of the washer adjacent the nut, without binding, for securing the fitting to the rail, while maintaining a desired alignment.