DOTFitting Guides
D.O.T. Air Fittings — Brass Compression, Brass NPT & Push-In Guide
Identify D.O.T. air brake fittings: brass compression, brass NPT, and push-to-connect (brass & composite) fittings — how each connects and seals.
D.O.T. air fittings connect the tubing in commercial air brake systems. They come in three main styles — brass compression, brass NPT, and push-to-connect — each with a different way of gripping and sealing the tube. Pick a tile below to see how each one works.
BRASS COMPRESSION
Brass compression fittings are commonly used in D.O.T. air brake systems. They create a secure, leak-proof connection by compressing a ferrule onto the tubing when tightened.
These fittings are ideal for copper, brass, and plastic tubing applications. They provide a reliable seal without requiring soldering or special tools.
Color-coded Fitting Tiles
