What are the names of the special couplers used on chemical cars?
Tank cars that carry Haz-mat products may use either standard E type couplers or F type tightlock frieght couplers. Regardless of wich type of coupler a given car may come equiped with, the coupler must also have top and bottom “shelfs” that prevent uncouplings from vertical slipage durring derailments or drawbar failures.
the correct term is “double shelf coupler”
csx engineer