Overview – TUBE NUT 3633179-20 Series
Built to Cummins specifications, the TUBE NUT 3633179-20 serves Cummins hydraulic and fuel line positions as the tube/flare nut; the cross-referenced series below covers the most common substitutions.
Parts Characteristics
A tube (flare) nut that clamps a flared tube end into its fitting, holding the line sealed against pressure. It is the most-reused connector on any fluid system, so a correct thread and seat keep the joint from weeping or backing off.
Applicable Models & Applications
Used across Cummins line positions specifying this tube nut. Match the thread, the flare angle and the hex against your old nut – tube nuts differ in how they seat and seal.
Maintenance & Replacement
Replace tube nuts as a set at every line service. A new nut onto a flared end that has been over-tightened seats poorly and weeps from the first hour.
Confirm the flare is sound before reusing the line. A nut that looks right onto a cracked flare still leaks, and the leak is what loses the pressure.
Torque the nut to the figure the joint calls for. A nut torqued dry or to the wrong value either cracks the flare or never clamps.
Keep the common tube nuts for your system on the bench. They are cheap, they are load-critical, and a line open on a nut is a machine waiting on a small part.
Price Reference (USD)
The TUBE NUT 3633179-20 is offered in the USD 2-12 range, with quantity breaks available for fleet maintenance programs.
Value & Service
We supply brand-new Cummins tube flare nuts with the thread and flare confirmed against your line, so the joint stays clamped to spec.
Related interchange numbers for the TUBE NUT: S1026-20 – confirm the exact variant against your model’s parts book before ordering.
When you need a dependable TUBE NUT 3633179-20 for your Cummins General Parts, Racer Machinery keeps the right units in stock and ships worldwide so your machine is back to work without delay.
