LOSTAR Air Valve Knob Pair - Chrome Screw-On Replacement for Peterbilt, Kenworth & Freightliner, Aluminum Corrosion-Resistant

LOSTAR air valve knob pair for tractor and trailer is a chrome-finish screw-on replacement designed to fit Peterbilt, Kenworth and Freightliner trucks with screw-style knobs.

If your rig uses screw-on style air valve knobs and you want a durable, corrosion-resistant set that clearly labels tractor and trailer controls, these replacement knobs from LOSTAR deliver a straightforward upgrade. The set includes two aluminum alloy knobs plus two stainless steel plaques finished in chrome, and they’re built to withstand daily use while maintaining a polished look.

Will these knobs fit my truck?

These knobs are intended for trucks that use screw-on style air valve knobs—not pin-style actuators. They’re compatible with popular makes such as Peterbilt, Kenworth and Freightliner when the vehicle uses a threaded knob interface.

• Fits screw-on type air valve stems only, not pin-style designs.
• Compatible with many Peterbilt, Kenworth and Freightliner models that use threaded knobs.
• Includes separate tractor and trailer stainless-steel plaques for clear identification.

How durable and weather-resistant are these knobs?

The knobs are machined from aluminum alloy and paired with chrome stainless-steel plaques for enhanced corrosion resistance and a long service life. They’re finished to resist road grime and exposure, but proper installation and routine inspection extend longevity.

• Aluminum alloy body reduces weight and resists rust.
• Chrome surface finish and stainless plaques protect against corrosion.
• Built and tested under quality control standards for dependable performance.

What’s included and how easy is installation?

The package contains two air valve knobs and two chrome stainless-steel plaques labeled for tractor and trailer use. Installation requires a screw-on replacement of existing threaded knobs and is straightforward for anyone familiar with basic truck component swaps.

• Package: 2 aluminum alloy knobs and 2 chrome stainless plaques.
• Screw-on installation—no pin adapters required when replacing threaded knobs.
• Work in a ventilated area and follow vehicle maintenance guidelines while installing.

What warranty and support come with this purchase?

LOSTAR backs these knobs with a 1-year unlimited-mileage quality guarantee and customer support for questions or issues. The warranty covers defects in material and workmanship under normal use.

• 1-year unlimited-mileage quality guarantee from LOSTAR.
• Customer support available for fitment or product questions.
• New product shipped with tested performance expectations.

Who is this for: Truck owners and fleet operators who need a reliable screw-on air valve knob replacement—especially drivers of Peterbilt, Kenworth and Freightliner rigs that use threaded knobs. This set is a good fit for technicians and DIY owners who want clear tractor/trailer labeling, improved corrosion resistance, and a simple swap-in installation. If your truck uses pin-style valve knobs, select a compatible pin-style replacement instead.