3/16 in. OD x 1/4 in. Male NPT Adapter with #26002
3/16 in. OD x 1/4 in. Male NPT Adapter with #26002
Overview
The Midland 26178 is a brass captive-sleeve male adapter that connects 3/16 in. compression tubing to a 1/4 in. male NPTF port. The captured brass sleeve makes up a leak-tight ferrule seal on the tube while the 1/4-18 male thread joins to a tapped fitting, valve, or pump body. Ideal for small-bore instrument and chemical-feed lines.
Technical Specifications
| Part Number (MPN) | 26178 |
| Fitting Type | Male Adapter |
| Connection 1 | 3/16 in. Compression |
| Connection 2 | 1/4 in. Male NPTF |
| Thread Size 1 | 3/8-24 |
| Thread Size 2 | 1/4-18 |
| Temperature Rating | -65°F to 250°F |
Materials of Construction
| Body | Brass |
| Sleeve / Nut | Brass (captive) |
Typical Applications
Use the 26178 to land 3/16 in. tubing onto a 1/4 in. female NPT port on metering pumps, solenoid valves, gauges, and instrument manifolds. The small compression-to-male-pipe transition is common on chemical injection and analyzer sample lines.
Cross-Reference and Interchange
This brass compression adapter cross-references to these competitor and industry part numbers: 00268-0304, 5220K63, 968A-3B. Replacing one of these? Match nominal size, connections, and rating, or send us your part number and we will confirm the interchange.
Sizing and Installation Resources
- Compression Fitting Sizing Chart
- NPT Thread Tightening: Turns Past Hand Tight
- Teflon Tape vs. Pipe Dope
- Metering Pump Chemical Compatibility Chart
Frequently Asked Questions
Which side is the tube and which is the pipe thread?
The 3/16 in. compression end takes the tube; the 1/4 in. male NPTF end threads into a female pipe port.
Do I use sealant on the NPT thread?
Yes, apply PTFE tape or pipe dope to the tapered male NPT thread. Do not seal the compression side.
Is the sleeve included?
Yes, this is a captive-sleeve design with the brass ferrule retained on the fitting.
Will it handle chemical metering duty?
Brass suits water, oils, and many treatment chemicals; verify compatibility with your specific media.
⚠ WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.