This Miller Industries part is a 7/16" lynch pin for connecting removable
rails. It is also used in various other areas.
    -  Works with any steel removable rails 
-  Steel or Aluminum Rails
-  Product Dimensions: 2.15"L x 1.95"W x 0.57"H 
-  Inner Diameter: 1.7" 
-  Outside Diameter: 1.95"