Milton S-790 1/4″ Female NPT L-Style Air Line Fitting – Reliable Steel Construction


SKU B000FLSAXI Category


The Milton S-790 is a high quality 1/4″ FNPT female L-style pneumatic coupler fitting made from durable steel construction. This air line fitting is designed for reliability and long lasting performance for automotive, industrial, agricultural, fleet, and MRO applications.

Durable Steel Body Resists Rust and Corrosion

The body of the Milton S-790 coupler is constructed from steel that has been silver plated to resist rust and corrosion. The steel material ensures these push-to-connect style fittings have the strength to handle high pressure compressed air lines up to 300 PSI without leaking or failing prematurely.

L-Style Design Provides Secure Pipe Connections

The L-shape design of these 1/4″ NPT female fittings allows them to securely lock air lines in place and prevent accidental disconnection from vibration or movement. The coupler sleeve locks the air line or component in place for a tight seal. Simply push in the air line or fitting all the way and the sleeve locks into place. To release, pull back the sleeve and disconnect.

Optimal Air Flow Rates for Pneumatic Systems

With a flow size of 1/4″, these L-style couplers provide efficient air flow up to 32 SCFM (standard cubic feet per minute). This air flow capacity makes them ideal for powering small to medium pneumatic tools, actuators, cylinders, and other components that require 1/4″ NPT thread connections.

Wide Temperature Range from -20°F to 250°F

The Milton S-790 couplers withstand operating temperatures ranging from -20°F to 250°F. The steel construction and plating allows them to perform in cold winter climates as well as hot engine bays and industrial environments. High heat resistance ensures seals remain intact.

Use Milton Couplers for Reliable Air Line Connections

Milton has been producing quality pneumatic components since 1943. Their L-style air line fittings are trusted by automotive service shops, industrial factories, fleets, farms, and other operations that rely on well-made air line connectors. Choose Milton when you need robust fittings that provide secure, leak-free connections year after year.

Overview of Features

  • 1/4″ FNPT straight female thread
  • L-shaped 90 degree angle design
  • Durable steel construction with silver rust-resistant plating
  • Sleeve release push-to-connect fitting
  • 300 PSI maximum pressure rating
  • Operating temperature range of -20°F to 250°F
  • 1/4″ flow size for up to 32 SCFM air flow
  • Connect air lines, pneumatic tools, cylinders, valves, and more

Reliable Air Line Connections for Any Application

The Milton S-790 1/4″ L-style fitting allows you to securely join air lines, tools, actuators, valves, and pneumatic equipment with 1/4″ female NPT ports. The push-to-connect sleeve design provides quick coupling and uncoupling of air systems with just a push or pull.

Whether you’re building an automation system, powering air powered tools in your home shop, or managing the compressed air lines at an industrial facility, these Milton couplings maintain secure, leak-free connections you can count on. The silver plated steel body withstands corrosion and rust to provide long lasting performance in any environment.

How to Use Milton S-790 Couplers

Using the Milton S-790 is quick and easy:

  1. Push air line or fitting with 1/4″ male NPT thread into opening of coupler.
  2. Push until it bottoms out and the sleeve locks into place.
  3. Check for secure connection by trying to pull air line out.
  4. To disconnect, pull back the sleeve to release air line.

No tools or sealants are required to connect and disconnect the air fittings. The push-to-connect design provides quick couplings for convenient changes or replacements of air powered equipment.

Before use, ensure threads are clean and free of debris. Visually inspect o-rings for damage or wear and replace if necessary.


  • Thread Size: 1/4″ FNPT
  • Body Material: Steel
  • Finish: Silver Plated
  • Style: L-Shape Female Coupler
  • Temperature Range: -20°F to 250°F
  • Working Pressure: 300 PSI
  • Air Flow: 32 SCFM at 100 PSI

The Milton S-790 1/4″ FNPT L-style coupler is built to provide reliable performance for your compressed air system. Order today to get your pneumatic connections secured with these durable and easy-to-use air line fittings!


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