Bronze-silver braze (or sil-brazed) fittings, crafted from ASTM B-61 or B-62 bronze, feature a pipe-sized end socket with a precisely machined groove for a silver ring insert. This design allows for secure joining without the need for extra silver solder. The lack of threads eliminates any potential reduction in joint strength, resulting in a robust and durable connection.ternative to threaded fittings.