Straight Adapter, Connection Size 1: 5/16 in, Connection Type 1: Inverted Flared, Connection Size 2: 3/8 in, Connection Type 2: Male NPTF, Brass, 1/2-20 x 3/8-18 Thread, 3/4 in Hex, For Use With: Aluminum, Brass, Copper, Steel Hydraulic Tubing That Can Be Flared, 1.01 in L, 1200 psi, -65 to 250 deg F, Additional Information: 0.032 in Tube Wall Thickness