Code 61 Flange. A machined flush mounting flange affixed by 4 bolts rated for up to 3000 PSI. This is a clear zinc plated carbon steel bite to wire crimp fitting. 43 series / Z comp interchange for 2 wire, and 71 series interchange for 4 wire. Additional options such as compression (-C, U series equivalent) and materials such as stainless steel (-SS) are available.