Ball Studs mate with ball cup end fittings to mount gas springs in place. The ball size must match between both the ends fitting and the ball stud for proper installation. Ball Studs attach by different means depending on the application (weld on, rivet on, thread in). Associated Spring RAYMOND offers ball studs in a variety of sizes, mounting options, & materials. Like other core products our engineered solution services section details custom solutions for a single part or a complete assembly if you cannot find a standard solution.