Suffix H: ① Kunshan product, often with spaces on both sides of H, generally industrial packaging, e.g., 6002ZZCM H NS7S6; ② Lowercase h indicates that the rings and rolling elements are made of stainless steel, e.g., 6203h; ③ Designation for adapter sleeve type, e.g., H318X; ④ High-load spherical roller thrust bearing, e.g., 29232H