1/4 in. x 1/8 in. Brass Poly-Flo x Female NPT Adapter
1/4 in. x 1/8 in. Brass Poly-Flo x Female NPT Adapter
✓ In stock at our distribution warehouses — typically ships within 1–2 business days.
Flat-rate shipping, nationwide- Orders under $100: $9.95
- $100 – $499.99: $14.95
- Orders $500+: quoted — real freight for your order, not a flat guess
Volume order or crossing a competitor part number? Request a quote — usually answered the same business day.
The 1/4 in. x 1/8 in. Brass Poly-Flo x Female NPT Adapter is a brass Poly-Flo adapter that creates a leak-tight tube connection without flaring the tube end. A ferrule or cutting ring bites into the tube OD as the nut is tightened — forming a metal-to-metal seal rated for high pressure without any tube preparation beyond a clean, square cut. Flareless fittings are the standard in hydraulic instrumentation lines, high-pressure control systems, and OEM equipment where tube flaring is impractical.
Technical Specifications
| Specification | Value |
|---|---|
| Material | Brass (dezincification-resistant) |
| Connection Type | Flareless (ferrule/bite-type or Poly-Flo) |
| Shape | Adapter |
| End Connections | See product title |
| Application | Instrument tubing, hydraulic, fuel lines |
Key Features
- No tube flaring required — cut tube square and assemble
- Ferrule or cutting ring creates metal-to-metal seal rated for high-pressure service
- Brass construction compatible with copper, brass, and compatible aluminum tubing
- Resists vibration loosening better than soft-ferrule compression fittings on rigid tubing
- Standard in hydraulic instrumentation, fuel systems, and OEM control equipment
Common Applications
Hydraulic instrumentation and gauge lines, fuel injection system tubing, high-pressure instrument air, OEM control panel plumbing, and any high-pressure tubing connection on rigid steel or copper tube where flaring tools are not available.
Technical Resources
- SAE 45° vs. Inverted Flare vs. Flareless — Identification Guide
- Tube OD Sizing Reference
- Brass Fitting Types and Sizes Guide
Cross-References
This part is an equivalent for industry part numbers 02666-0402, 1266x4, 266-P-04x02, 266P-4-2, 266PF-4A, 4664A, 466-4A, 5053K37, 66P-4-2, 66PF-4-2, 9566-42, AP66-P-4X2, D9664A, D966-4A, F266-4-2, MP66-42, PG66C. Searching one of those? This is your match.