The RAP-379U-252050-KAY1 consists of a 1.5″ diameter rubber ball, connected to a 1/4″-20 X .50″ male threaded post and tooth lock washer.
Standard U.S. Thread Diameter and Pitch Option:
1/4″-20 X .50″
High Strength Composite & Steel
1.5″ Rubber Ball Size
The „U” in the part number reflects product packaged in poly bag.