Four Seasons 59977 High Side A/C Service Port Retrofit Adapter - 1/4" Straight

The Four Seasons 59977 is a high side straight service port retrofit adapter designed to convert older R12 air conditioning systems to accept modern R134a refrigerant charging equipment. This adapter features a 1/4-inch (7/16-20 thread) SAE fitting configuration with a straight design for tight installations where clearance is limited.

Key Features:

• High side (discharge) service port adapter with straight configuration
• 1/4-inch SAE thread size (7/16-20 UNF) for R12 port connection
• Converts to 16mm R134a quick-disconnect fitting
• Precision-machined construction for leak-free performance
• Essential component for R12 to R134a A/C system retrofits
• Meets OE design and performance standards

This retrofit adapter allows technicians to service converted air conditioning systems with standard R134a charging equipment, eliminating the need for obsolete R12 hoses and fittings. The straight port design makes it ideal for installations where space is restricted or angled fittings would interfere with surrounding components. Manufactured by Four Seasons, a division of Standard Motor Products and the world's largest aftermarket mobile climate control parts supplier, this adapter is tested and validated to ensure reliable, long-term performance in automotive and light truck A/C systems.