Agricultural header with flexible joint

An agricultural header for use with an agricultural harvester, the agricultural header configured to cut crop when the agricultural harvester moves in a direction of travel, the agricultural header comprising:

• a side frame,
• a side draper belt supported by the side frame and positioned to receive crop cut by the agricultural header and advance cut crop laterally relative to the direction of travel,
• a center main frame to which the side frame is coupled for movement relative to the center main frame,
• a center belt frame,
• a center draper belt supported by the center belt frame and positioned in register with the side draper belt to receive cut crop laterally therefrom and advance cut crop rearwardly toward the agricultural harvester opposite to the direction of travel, and
• a joint coupled to the center main frame and the center belt frame enabling relative fore-aft and lateral translation between the center main frame and the center belt frame, the joint being a sliding joint having a clevis with an interior region into which a tang extends for relative fore-aft and lateral translation, the clevis having an upper lug and a lower lug defining the interior region, the upper lug having a convex surface facing the interior region to guide relative fore-aft and lateral translation between the clevis and the tang.