Midland Industries 20203 Plastic Flareless Tube Cap 3/8 in

Product Description

The MIDLAND INDUSTRIES 20203 is a plastic flareless tube cap designed to seal 3/8-inch OD tubing in fluid and pneumatic line applications. It threads onto tubing ends with a 1/2-24 thread and holds a rated pressure of 150 psi across a wide service temperature range of -40 to 150 degrees F. Compact and lightweight, this cap provides a reliable, low-cost solution for capping off unused or temporary tube ends during installation, service, or system decommissioning. Plumbers, HVAC technicians, and mechanical contractors commonly use flareless caps like this one to isolate line segments or protect open tubing from contamination.

This cap is suited for residential and light commercial plumbing, HVAC, and fluid-transfer systems where 3/8-inch OD flareless tubing is present. It is a common service item used when capping refrigerant lines, hydraulic branches, or pneumatic circuits that are temporarily or permanently taken out of service. The plastic construction makes it appropriate for non-corrosive fluid lines where metal caps are not required.

Key Features

• Seals 3/8-inch OD flareless tubing with a 1/2-24 thread connection
• Rated to 150 psi for use in low-to-medium pressure line systems
• Service temperature range of -40 to 150 degrees F suits a broad range of environments
• Plastic construction resists corrosion in non-corrosive fluid applications
• Compact profile - 0.55 inches long, 0.35 inches wide, 0.35 inches tall
• Minimum order quantity of 1, convenient for single-unit service calls

Compatibility

Designed as an OEM-style flareless tube cap for systems using 3/8-inch OD tubing with a 1/2-24 thread fitting standard.

Installation Notes

Installation is performed by plumbers, HVAC technicians, or pipefitters working on flareless tubing systems. Always depressurize and isolate the tubing line before removing any existing fitting or installing this cap. Hand-tighten to engage threads, then snug with an appropriate wrench - do not overtighten plastic fittings, as excess torque can crack the body. Verify the system holds pressure after installation before returning it to service.