The 5/8 in Flare Nut short is highly dependable and an economical choice of fitting for fluid and air transmission within multiple application including heating and other industrial markets. This all-brass fitting features a vibration resistant construction. It resists mechanical pull-out and is designed for high pressure service. The temperature range is minus 65 deg F to 250 deg. BrassCraft® Nut, Short, Series: 41S, Fitting/Connector Type: Nut, 5/8 in Nominal, Flare, 1 in Hex, 1.12 in Length, -65 to 250 deg F, Brass, Rough, Domestic