Couplers and coupler repair kits are in stock at U S Trailer Center. A-frame Couplers, straight frame couplers, surge couplers, channel mount couplers, flat face coupler, 21,000 pound couplers, collar slide coupler, Bulldog couplers, A frame to channel coupler conversion 14k parts, channel mount coupler bolts, locking pins for couplers, pintle rings up to 20,000 pounds, other styles and weight capacity couplers can be ordered for next day delivery in most cases. Fulton fold away hinge kit reduces length up to 48 inches, 5000 pound capacity.