Lisle Line Sockets 19mm & 22mm for Cummins ISB/ISX — Low‑damage Fuel Fitting Tool Set

Lisle 12320 Line Sockets are two purpose-made service sockets (19mm and 22mm) engineered to remove and install fuel line fittings on Cummins ISB and ISX engines with reduced risk of damaging fittings or fuel rails.

These compact sockets give technicians a precise fit for the common quick-connect fuel fittings found on Cummins ISB and ISX diesel engines. Instead of prying or forcing a mismatch tool, the Lisle pair slides over the fitting to engage sealing surfaces and allows clean, controlled disconnection and reconnection. The set is lightweight and sized for garage toolboxes while built to withstand repeated shop use.

How do these sockets reduce the chance of fuel leaks?

The sockets are sized to match the diameter of original fuel fittings so they engage evenly and avoid metal deformation. Proper contact preserves the fitting's sealing surface and O-ring seating, lowering the likelihood of leaks after service.

• Precisely made 19mm and 22mm openings to fit OEM-style fittings
• Even force distribution to prevent scalloping or bending
• Helps preserve O-ring alignment and sealing surface integrity

Which engines and fittings are these sockets compatible with?

This Lisle set was designed for common fuel line quick-connects used on Cummins ISB and ISX engines, covering typical 19mm and 22mm sizes. Verify the fitting diameter on the vehicle before purchase to ensure a correct match.

• Fits Cummins ISB and ISX engine fuel line fittings
• Includes both 19mm and 22mm sizes to cover multiple fitting styles
• Ideal for OEM-style quick-connects and similar designs

How should technicians use and care for the sockets?

Slide the appropriate socket over the fuel fitting and use a ratchet or extension as needed to apply steady, controlled pressure. After use, clean debris from the inside of the socket and store in a dry toolbox to maintain fitment accuracy.

• Use a compatible ratchet or extension for controlled torque
• Wipe clean and inspect for wear after each job
• Store in a dry tool tray to avoid corrosion and preserve dimensions

What are the physical size and packaging details?

The item ships in a compact package suitable for retail shelves or a service van. The set is lightweight and easy to carry between jobs or store in a service drawer.

• Package dimensions roughly 2.8 x 18.4 x 10.6 cm
• Package weight approximately 0.433 kg
• Manufactured in China to Lisle specifications

Who is this for: The Lisle 12320 Line Sockets suit diesel mechanics, fleet maintenance technicians, and knowledgeable DIYers who service Cummins ISB and ISX engines and need a reliable, low-damage method to disconnect and reconnect fuel line fittings. If you perform routine fuel system maintenance, diagnose fuel leaks, or replace injectors or rails on compatible engines, this compact two-socket set simplifies the task while protecting delicate fittings and seals.