Midland Industries 21117 90-deg Mini Barb Elbow Brass

Product Description

The MIDLAND INDUSTRIES 21117 is a 90-degree single mini barb elbow fitting machined from brass. It connects 3/8-inch mini barb tubing on one end to a 1/8-inch male NPTF threaded port on the other, allowing a right-angle transition between flexible polythene tubing and a threaded fitting seat. The NPTF thread form - 1/8-27 - creates a pressure-tight dry seal without the need for additional tape or compound, though shop practice often dictates thread sealant per job requirements. Rated to 150 psi, this fitting is sized for use with 1/4-inch inside diameter polythene tubing and handles operating temperatures from -65 degrees F to 90 degrees F. Plumbers, HVAC technicians, and pneumatic system installers typically specify this fitting where a compact inline direction change is needed.

This fitting is suited for residential and light commercial applications where small-diameter polythene tubing must be routed around an obstruction or turned toward a threaded port on a valve, manifold, or instrument body. The compact dimensions - under 1 inch in length - make it practical in tight equipment enclosures. Common applications include low-pressure pneumatic control lines, water treatment or filtration tubing runs, and similar fluid-handling assemblies where a reliable 90-degree transition from flexible tubing to a threaded connection is required.

Key Features

• 90-degree angle routes tubing cleanly without bending or kinking polythene line
• 3/8-inch mini barb end retains 1/4-inch ID polythene tubing under pressure
• 1/8-27 male NPTF thread forms a dry, pressure-tight seal at the threaded port
• 150 psi pressure rating suitable for low-pressure fluid and pneumatic service
• Wide temperature range of -65 degrees F to 90 degrees F covers most ambient and process conditions
• Brass construction provides corrosion resistance and durability in fluid-handling environments

Compatibility

Designed for use with 1/4-inch inside diameter polythene tubing and 1/8-inch male NPTF threaded ports. Compatible with systems and components accepting a 1/8-27 NPTF thread standard.

Installation Notes

Shut off fluid or air supply and depressurize the line before installing or replacing any fitting. A plumber or pipefitter should verify that the mating port accepts NPTF thread before installation, as NPTF and NPT are similar but not identical in sealing behavior. Hand-tighten first, then use an appropriately sized wrench - over-tightening brass fittings can crack the hex or distort the barb. Secure the barb end with an appropriate clamp or verify that working pressure does not exceed the barb retention rating of the specific tubing used.