63AX3851 Union Fitting, OEM Air Pipe Union Fitting For Mack Heavy Duty Truck

63AX3851 Union Fitting, OEM Air Pipe Union Fitting For Mack Heavy Duty Truck 63AX3851 union fitting is an OEM replacement pipe connector specially built for Mack heavy-duty truck air brake systems, precision manufactured with high-tensile metal material for excellent pressure resistance and anti-leakage performance, tight thread design guarantees secure connection of air pipelines, withstands vibration and temperature fluctuations during long-haul transportation, effectively