Based on this product's specifications, here are some alternatives and similar models
Brass coupling Fitting SF60N-6/4 for plumbing 6/4" thread
Summary description:
Brass coupling Fitting SF60N-6/4 is a plumbing connector designed for joining pipes or fittings with a 6/4" thread. Made from brass, it provides corrosion resistance and mechanical strength for potable water and heating systems. Suitable for repair, installation, and maintenance tasks where a reliable threaded coupling is required.