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.
Yellow Cap (Control Line).
Key data for this version: thread R1/2" BSP. The Buyukdemir reference is 5-2040.
It belongs to the Yellow Cap Control Line / Gelber Deckel Bremsleitung — Standard Type range in the Buyukdemir catalogue.
This is the R1/2" BSP version; the nearest sizes in the same range are M16 X 1.5 (5-2020), M18 X 1.5 (5-2051), M22 X 1.5 (5-2001).
Manufactured by Büyükdemir Otomotiv in Istanbul, Türkiye, a producer of compressed-air brake and pneumatic components for trucks and trailers since 1957.
