Products Features * All Nigo 's products conform to specifications ASTM -LRB- land Society for Testing and Materials -RRB- B124 and B16 * NPT threads on all Nigo 's products ASME B1 .20.1 * designed for use in air, water, oil, nature, factory-made, integrated, liquefied petroleum or propane and LP Gas-Air * Use with brass, steel, and iron pipe ; Teflon tape and thread sealant are suggested for rib joints * Temperatures range from -40 to 302 F * Max. : 400 PSI WOG * total transfer design * Blowout proof stem * Connections : NPT brute x NPT brute x NPT brute About Us Nigo commercial enterprise Co ,. Ltd a considerable variety of valves and pipe fittings. The company foreign organization for standardization ISO 9001:2015 sound property Management System cubic measure.