The Robertshaw 5502-236 Infinite Switch is replaced by the 5502-236M. The 5502-236 is no longer available, so information is limited.
The 5502-236M features the same Dial Shaft Type D as the 5502-236, and measures 2" in length. Below is a diagram:

There are grooves along the length of the dial shaft, allowing you to break off sections to meet your desired length.
Both switches are rated 15 Amps at 240VAC. The spades are located in a different position
We do recommend reviewing the
5500 M Series product
Installation Data prior to purchase to familiarize yourself with the product and determine its suitability for your application.
Replied on September 14, 2023 by Brian from Industrial Stores