3/8 in. x 1/4 in. Compression x Male NPT White Nylon Adapter
3/8 in. x 1/4 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. (this page) | 17188N | $4.99 | — |
| 3/8 in. x 3/8 in. | 17189N | $2.99 | Add to cart |
| 1/2 in. x 1/2 in. | 17195N | $4.99 | Add to cart |
Overview
The Midland 17188N is a 3/8 in. compression x 1/4 in. male NPT adapter molded in white nylon, with a 9/16-24 x 1/4-18 thread combination and a 125 psi rating. It joins 3/8 in. OD tubing to a 1/4 in. male NPT port and is rated from -40°F to 200°F, giving metering and dosing lines a tough, lightweight connection.
Technical Specifications
| Part Number | 17188N |
| Tube Size | 3/8 in. compression |
| Thread Size | 1/4 in. male NPT (9/16-24 x 1/4-18) |
| 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
Connects 3/8 in. tubing to 1/4 in. NPT ports on chemical metering pumps, injection fittings, and instrumentation lines. White nylon is a good all-around choice for alkalis, fuels, and many solvents, and is widely used on dosing skids where a non-metallic, low-cost adapter is preferred over brass.
Cross-Reference and Interchange
This white nylon compression adapter cross-references to these competitor and industry part numbers: 10-6-4N-0, 50775K333, 5686B, 568-6B, D50686B, D5068-6B. 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, over a temperature range of -40°F to 200°F.
What tubing fits this adapter?
It accepts 3/8 in. OD semi-rigid tubing such as nylon or polyethylene; tighten the compression nut to seat the sleeve.
Should I use thread sealant on the NPT end?
Yes, apply PTFE tape or pipe dope to the 1/4 in. male NPT threads and 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.