Feature: 1. Weldless bulkhead fitting parts, just drill a 42mm hole, and then tighten the lock nut. 2. Very suitable for installing top of a Turbo 500 boiler and working on kettles with a minimum diameter of 2in. 3. Selected high‑quality stainless steel materials, safe, non‑toxic, durable and corrosion‑resistant. 4. Easy to use, this fitting will allow you to turn any 48mm hole into a for tri clamp connection. 5. This bulkhead is weldless design, allows you to add a TC port to any vessel no need welding or soldering. Specification: Item Type: Bulkhead Set Material: Stainless Steel Weight: Approx. 288g / 10.2oz Inner Diameter: Approx. 42mm / 1.7in Total Height: Approx. 30mm / 1.2in Installation Notes: 1. Hole size required: 42MM 2. The lock nut hex measures 60mm 3. The front of the flange does not have flats for a wrench. The easiest way to hold the flange for tightening is to clamp any other TC parts on with the gasket and clamp. Once tight, you can insert a long rod or screw driver into the hole of the wing nut.. Package List: 1 x 2in SS304 for Tri Clamp Adapter1 x SS304 DN 40 Nut1 x Cover Note: 1. Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. We recommend using a 42mm hole saw to mount it to the kettle.