A heat shield panel (126, 128; 402, 404) for use in a gas turbine engine combustor (56) is disclosed. The heat shield panel (126, 128; 402, 404) includes a hot side, a cold side and at least one attachment mechanism (275; 406) having a stud (250; 408) and a central axis extending through the stud (250; 408) and a plurality of standoff pins (154; 254; 300; 410) positioned circumferentially around the stud (250; 408), the standoff pins (154; 254; 300; 410) having a radial extent, a circumferential extent that is greater than the radial extent, a radially outer surface having a radially convex shape and a radially inner surface having a radially concave shape.