Mastercool 83934 Manual Low Side Coupler for R1234yf

Forged Brass. Precision Engineered. Built to Protect Every Connection. Mastercool’s R1234yf Manual Couplers start with a single forged brass body — no welded seam, no joint, no weak point. Every dimension, from the seal gland to the hex, is engineered to spec rather than left to chance, giving technicians a coupler that seals right, fits right, and protects the service port on every connection.

• Compliance: Meets SAE J639 & J2888
• Low Side: 12mm-F x 14mm Service Port Major Diameter
• Hex: Precision-Machined 18mm Across Flats
• Body: One-Piece Forged, Nickel-Plated Brass
• Construction: All-Metal, No Plastic Components
• With Extended Disconnect Protection Sleeve