3/8 in. x 3/8 in. Compression x Male NPT White Nylon Adapter
3/8 in. x 3/8 in. Compression x Male NPT White Nylon Adapter
Sizes in This Series
White nylon compression x male NPT adapters. Jump to another size or add it straight to your cart:
| Size | Part # | Price | Cart |
| 3/8 in. x 1/4 in. | 17188N | $4.99 | Add to cart |
| 3/8 in. x 3/8 in. (this page) | 17189N | $2.99 | — |
| 1/2 in. x 1/2 in. | 17195N | $4.99 | Add to cart |
Overview
The Midland 17189N is a 3/8 in. compression x 3/8 in. male NPT adapter molded in white nylon, with a 9/16-24 x 3/8-18 thread combination and a 125 psi rating. With matching 3/8 in. tube and 3/8 in. NPT sizes, it gives a straightforward, corrosion-resistant transition from 3/8 in. OD tubing into a 3/8 in. threaded port on dosing equipment.
Technical Specifications
| Part Number | 17189N |
| Tube Size | 3/8 in. compression |
| Thread Size | 3/8 in. male NPT (9/16-24 x 3/8-18) |
| Fitting Type | Adapter |
| Material | Nylon (White) |
| Pressure Rating | 125 psi |
| Temperature Rating | -40°F to 200°F |
Materials of Construction
| Body | Nylon (White) |
| Nut & Sleeve | Nylon (White) |
Typical Applications
Used where 3/8 in. tubing terminates at a 3/8 in. NPT port on metering pump heads, manifolds, and chemical feed assemblies. The non-metallic nylon body resists alkalis, fuels, and many solvents, making it a common fit on water-treatment and industrial dosing lines that avoid brass.
Cross-Reference and Interchange
This white nylon compression adapter cross-references to these competitor and industry part numbers: 10-6-6N-0, 50775K335, 5686C, 568-6C, D50686C, D5068-6C. 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
- Metering Pump Chemical Compatibility Chart
- Chemical Compatibility Chart for Fluid Handling
- NPT Thread Tightening: Turns Past Hand-Tight
- Teflon Tape vs. Pipe Dope
Frequently Asked Questions
What is the pressure rating?
125 psi, across a -40°F to 200°F temperature range.
Are the tube and thread sizes both 3/8 in.?
Yes. It takes 3/8 in. OD tubing on the compression end and threads into a 3/8 in. male NPT port.
Do I need sealant on the threads?
Yes, use PTFE tape or pipe dope on the 3/8 in. male NPT, then tighten one to two turns past hand-tight.
WARNING: This product can expose you to chemicals 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.