Xray 6.8mm ball studs with backstop
Coming from Xray and made for the XB8 series of vehicles are 6.8mm steering knuckle ball studs with backstop. The pivot balls are available in a short 8mm and a long 11mm variant both of which feature an M3 thread and a hardened surface for less wear. Their design with backstop reduces the change to popping of the ball cup in the event of a crash or in a hard landing. The balls come in sets of two.
Source: Xray [teamxray.com]