Two-pieces construction, nut and body. Use with copper, brass, aluminum or steel tubing. -65 to 250 deg F temperature range. Standard fittings use short nuts. Long nuts are used for higher vibration applications. Resists mechanical pullout. Easy to disassemble and can be reassembled many times with no effect on the seal. Primarily used to fuel equipment, plumbing, gases, refrigeration and vacuum. UPC individually bagged.