Safety stop cock, brass, self-closing with flame trap, 3/4'' thread, pack of 1. Supplied = assembled. Thread = 3/4 inch. Material = brass. Seal material = PTFE. Feature = flame retardant, self-closing. Product type = drum handling. For flammable media, lockable Self-closing to prevent uncontrolled leakage. Flame traps protects against spread of fire and ignition of contents.