HOLLAND L Series
Popular with original equipment manufacturers, L series kingpins come in three models.
For AAR (American Association of Railroads) applications.
This model, when properly installed, meets or exceeds the performance requirements of the America Association of Railroads (AAR) standard M-931, Truck and Trailer Manufacturers Association (TTMA), and the Society of Automotive Engineers (SAE).
Specifications:
Material: AISI 4320H and 4718H
Hardness: 380-420 BHN
Quality: Manufactured to a proprietery standard for both
surface and interior sound, and for dimensional
accuracy.