DIN 2189 (≈ DIN 5156). With oil grooves; optimum lubrication effect even in deeper threads.
The innovative polygon form permits a wide application spectrum. The multi-function layer structure achieves maximum service life even in high-tensile materials.
Special TiAlN coating, highly suitable for aluminium alloys.
For Whitworth parallel pipe threads DIN-ISO 228/1 (threads that do not form a seal within the connection).