Parker 640F-8 Brass Flared Tube Cap 1/2 in 45 Degree

Product Description

The PARKER 640F-8 is a brass flared tube cap designed to seal the end of a 1/2-inch OD flared tube line. It uses a 45-degree SAE flare end connection and a 3/4-16 thread to create a pressure-tight closure on open tube ends. Rated to 750 psi maximum working pressure and a maximum working temperature of 250 degrees F, this cap is built for demanding service in refrigeration, HVAC, and hydraulic tubing systems. The all-brass construction resists corrosion and withstands the mechanical stress of repeated service work. Licensed HVAC technicians and plumbers use this fitting to cap off unused ports, isolate sections of a system during service, or permanently close decommissioned lines.

This cap is suited for residential and light commercial applications where SAE 45-degree flare fittings are standard. Typical installation scenarios include capping refrigerant line sets, hydraulic tubing, or fuel and oil lines during system maintenance or when a port is taken out of service. The fitting meets SAE J512 and SAE J513 standards and carries a UL Listing, making it appropriate for systems that require documented compliance. With an overall length of 0.84 inches and a weight of 0.06 pounds, it is a compact, lightweight cap that fits easily into a technician's fitting kit.

Key Features

• 45-degree SAE flare end connection for a leak-free pressure seal
• 3/4-16 thread size compatible with standard SAE flare tube fittings
• Rated to 750 psi maximum working pressure
• Maximum working temperature of 250 degrees F (121 degrees C)
• Meets SAE J512, SAE J513, and carries UL Listing
• All-brass construction for corrosion resistance and durability

Compatibility

Designed for use with 1/2-inch OD tubing using 45-degree SAE flare end connections per SAE J512 and SAE J513 standards. Suitable as an OEM-style cap fitting for refrigeration, HVAC, hydraulic, and fuel line applications requiring a 3/4-16 threaded flare cap.

Installation Notes

Installation should be performed by a licensed HVAC technician or plumber. Depressurize and isolate the line completely before removing any existing fitting or installing this cap. Hand-tighten the cap onto the flared tube end first to ensure proper thread engagement, then tighten with an appropriately sized open-end wrench — do not overtighten, as brass threads can be damaged. Verify the flare seat is clean and undamaged before assembly to ensure a leak-free seal.

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.