In sizes from 1/8 to 3/4 in. tapered NPT, reinforced nylon fittings are extra-strong, chemical-resistant, and able to handle temperatures to 140°F and pressures to 200 psi. They are suitable for air, vacuum, and liquid systems in many applications. Industrial Specialties Mfg., Inc., Englewood, CO• Thread: 1/4-28 UNF Hex Nut • Material: Black Nylon