Victaulic Series 761 Tamper Resistant Handle Conversion Kit E80 and NHT all refer to Size:6" x 4" and NHT all refer to the exact same type of thread A hard coated aluminum construction helps reduce weight while providing a durable surface for demanding fire Can be installed without removing the valve from the piping system Application Typical Use Water truck valve controls Helps prevent unintended adjustment of a Series 761 valve Dust suppression systems Secures a manually selected valve position Equipment maintenance Converts an existing compatible 10 position operator Industrial piping Adds tamper resistance to an installed Series 761 butterfly valve Confirm the valve series