Collection: 421 Series NPT Hose Tails - Speedflow

Speedflow 421 Series NPT hose tail fittings

Connect a male NPT thread to a hose-tail connection with Speedflow 421 Series black anodised aluminium fittings. Compare the NPT thread size and hose barb diameter on each listing to select the combination for your installation.

Sizes listed in this collection

• 1/16" NPT: 1/4" hose tail.
• 1/8" NPT: 3/16", 1/4", 5/16" and 3/8" hose tails.
• 1/4" NPT: 5/16" and 3/8" hose tails.
• 3/8" NPT: 5/16", 3/8" and 1/2" hose tails.

Choosing the right fitting

Match the male NPT thread to the component's female NPT port, and select the hose tail to suit the hose's specified internal diameter. NPT thread size and hose size identify different ends of the fitting; check both rather than selecting by one size alone.

Confirm that the fitting, hose and hose-retention method suit the fluid, operating pressure and temperature of your installation. Rubber or silicone construction alone does not establish hose suitability for fuel, oil or pressurised service. Follow the fitting and hose manufacturers' installation instructions, including their requirements for thread sealing and hose clamps.

Check the individual product listing for the exact size combination and part number before ordering.