WEBPintle Hitches HP500C Spring Mounted Pintle Hooks These heavy duty spring, swivel mounted pintles are recommended for off road equipment. Unit must be mounted to a plate of at least ¾" thick. Shank diameter is 2". Mounts with 6-½" bolts, not included. Accepts 2½" and 3" ID pintle rings. HPSP15 15 Ton pintle, spring swivel mount $209.95