【HARDLINE FITTING & STANDARD PARTS】: Only compatible with hard tube. 8AN to 3/8 inch,the thread size of the 8AN is 3/4-16UNF.It's fits to 3/8" OD hardline,please measure before perchase. 【AIRCRAFT GRADE MATERIAL】: 8AN male flare thread (3/4-16) to 3/8 inch tube hose fitting connector with brass insert Lightweight 6061-T6 cnc machined billet aluminum black anodized Black anodized finish. 【TIGHTNESS & CORROSION RESISTANCE】Manufactured to exacting standards for tight, leak-free connections. Connect 3/8" tube to -8 AN Male ends.Black anodized finish assure positive sealing and come in a corrosion-resistant finish. 【WIDE RANGE OF APPLICATIONS】: This 3/8 hardline to 8an fitting is widely used in Brake System / Air & Fuel Delivery/ Engine Modification / Oiling System / Cooling System. 【WORKING PRESSURE & TEMPERATURE】Maximum working pressure: 4000PSI,Working temperature: -65°F to 252°F., Weight: 0.110231131 pounds, Manufacturer: CNRAQR