#6 Sealing Washer Heavy Duty 4373

Description

The #6 Heavy-Duty Sealing Washer (Part #4373) is an OEM-grade stat-seal washer engineered specifically for commercial truck and heavy-duty air conditioning (A/C) systems.

Built with an elastomer inner seal mechanically bonded to a rigid metal outer retainer, it delivers a secure, positive seal on #6 liquid line fittings, condenser connections, and manifold blocks—even under severe engine vibration and fluctuating thermal conditions.

• Fitting Dash Size: #6 (5/16″ nominal line size)
• Component Type: Stat-Seal / Bonded Sealing Washer
• Refrigerant Compatibility: R-134a, R-1234yf, R-12
• Application: Heavy-duty commercial truck A/C line & block fittings