Treaded Head Studs in  a 4G63 2.3 Mitsubishi Stroker  engine.

All fastners, nuts, bolts, studs, screws, nails, wire, clamps, etc.  can be improved with Cryogenic Processing.  The internal stress relief is a primary benefit for this type of component, but less surface friction and improved heat dissipation are also significant for any fastner.