The Eastman 15/16-IN OD Brass Flare Cap seals unused flare connections in gas systems. Female flare cap threads onto the gas connector nut or flare fitting to close the port. Suitable for most water heater, dryer, gas log, and space heater installations. Includes: (1) 15/16-IN OD FEMALE FLARE CAP. DO NOT APPLY THREAD SEALANT TO FLARED ENDS!