This fitting is a unique piece that converts your Anvil Foundry Lid to have a 1.5" TC port in the center with no drilling or major tools. This allows you to put any 1.5" TC accessory on there but in our opinion the primary use is to attach a steam condenser such as our Steam Slayer product.
To be clear, the hole size this fitting is designed to fill is 1-7/8" (or up to 2" max) or 47 to 49mm. The TC flange side is a 1.5" TC which measures 2" across the flange. This fitting is very similar to our True Bulkhead TC fittings but the threaded bulkhead size is larger.
The secondary picture shows its application as installed in the foundry lid. Neither the lid, nor the foundry unit itself, is included for this price. You'd think this goes without saying but people are really silly sometimes. Not you though. You're cool.