TRS-S763AB-4 Stainless Steel Drop-In Tube Insert for 1/4″ Nylon Air Brake Tubing, DOT Approved, -40°F to 225°F, 145 PSI

TRS-S763AB-4 is a precision-formed stainless steel drop-in tube insert designed for 1/4″ ID SAE J844 nylon air brake tubing. This insert reinforces the tubing for use with push-to-connect and compression-style air brake fittings, ensuring a tight and reliable seal under demanding conditions. It supports repeat assembly and disassembly and is engineered for use in air brake systems and in-cab air control circuits. Meets DOT requirements when used with compliant components.