Since there are multiple sources for an equipment's stats to come from, there's no direct access to the stats. The GetBonus function of the EquipShortcut class (i.e. an instance of an equipment, e.g. equipped on a combatant's equipment part) allows you to get all combined bonuses, e.g.:
StatusPreviewInformation info = new StatusPreviewInformation(null);
combatant.Equipment[0].Equipment.GetBonus(ref info);
The StatusPreviewInformation class has public access to all different bonuses provided by the equipment. Please note that status value bonuses are seprated in value and percent bonuses.