JB K1-5 Male Flare Drum Adapter

The JB Industries K1-5 refrigerant drum adapter is a heavy-duty, American-made fitting designed for precision-critical fluid transfer between standard 3/4" NPS female connections and 1/2" male flare lines. Machined from high-tensile C360 and C370 brass at JBÆs Aurora, Illinois facility, this NPS drum adapter offers superior resistance to corrosion and stress cracking compared to lower-quality imports. This 3/4 NPS to 1/2 male flare fitting is engineered to maintain a reliable seal under high-pressure conditions, frequently handling vacuum and pressures up to 5,000 PSI depending on system variables. Each HVAC drum adapter includes a durable fiber gasket to ensure a leak-proof interface with the drum valve. Built to satisfy SAE J513 standards, this robust refrigerant tank adapter is essential for contractors requiring consistent "make and break" performance and vibration resistance during high-volume charging or recovery operations. Use a compatible thread sealant and tighten 2-1/2 turns past hand-tight for optimal results.

• Precision Machined Brass: Forged from 65% copper and 35% zinc to ensure maximum tensile strength and prevent hairline fractures during high-torque applications.
• Superior Seal Integrity: Includes a high-grade fiber gasket (JB part K1-E) to prevent refrigerant loss and atmospheric contamination at the drum connection.
• NPS to Flare Transition: Seamlessly adapts 3/4" - 14 NPS threads to a 1/2" SAE male flare, providing a standardized connection point for manifold hoses and recovery equipment.
• Field Reliability: Conforms to ARI and AHRI specifications for refrigeration service, offering the vibration resistance required for mobile service and industrial environments.

What is the thread type on the female side of the K1-5?
The female side features a 3/4" NPS (Nominal Pipe Size) straight thread, which is the standard size for most large refrigerant drums and tanks.

Will this adapter work with high-pressure refrigerants like R-410A?
Yes, the K1-5 is constructed from heavy-duty brass capable of handling the high operating pressures associated with modern refrigerants, though the gasket should be inspected regularly for wear.

Is the gasket replaceable?
Yes, the internal fiber gasket can be replaced if it becomes compressed or damaged. The standard replacement part is the JB K1-E 3/4" fiber drum adapter seal.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.