Description
Coupling heads connect the compressed-air brake lines between a towing vehicle and its trailer. The head seals the line when the vehicles are uncoupled, so the circuit holds pressure and the service and supply lines stay separated. The colour of the cap follows the usual convention: yellow for the control (service) line, red for the supply (emergency) line.
Key data for this version: thread M22 X 1.5. The Buyukdemir reference is 5-2022.
It belongs to the Coupling Heads Standard Old Type (Without Plastic Cap) / Ohne Plastic Deckel range in the Buyukdemir catalogue.
It cross-refers to the original equipment numbers 452 200 000 0, 000 429 47 30, 81 51220 0002, 81 51220 6029.
This is the M22 X 1.5 version; the nearest sizes in the same range are M16 X 1.5 (5-2023), R1/2" NPT (5-2024), R1/2" BSP (5-2025).
Manufactured by Büyükdemir Otomotiv in Istanbul, Türkiye, a producer of compressed-air brake and pneumatic components for trucks and trailers since 1957.
