On dually motorhome tires how is it possible to reach in and hit the release button?

I had to remove my decorative hubcaps on round holes but otherwise it worked great if you have oval holes should work fine

How do i screw my milwaukee m18 inflator onto the 1/4" f npt fitting?

The Milwaukee M18 inflator does not appear to accept 1/4" NPT chucks - but rather has a standard screw-on nozzle. An adapter will need to be used for the unit to accept this chuck.

Why does the air keep flowing when not on a valve stem?

The chuck does not have a valve built in it. You have to connect the supply end to a valve, either a lever type or a pushbutton type valve.

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Description

⚡ Lock, Inflate, Done — The Tire Chuck That Works as Hard as You Do

EFFORTLESS ACCESS - Dual 360-degree swivel head with a 7-inch extended neck reaches even the toughest tire valves on trucks and RVs.
LOCK IN PERFORMANCE - Patented self-locking nozzle guarantees an airtight seal—no more frustrating air leaks during tire inflation.
SPEED MEETS PRECISION - Lightning-fast quick-release button ensures zero air loss and rapid detachment for efficient tire maintenance.
OPTIMIZED FOR PRO TOOLS - Designed exclusively for inline tire inflator gauges with 1/4” NPT fittings—perfect for professional-grade setups.
ENGINEERED FOR LONGEVITY - Built on 35+ years of expertise and backed by JACO’s lifetime warranty—durability you can trust on every job.

The JACO Lightning T-Series Tire Air Chuck is a professional-grade, patented quick-connect tool engineered for dual wheel trucks, RVs, and heavy-duty vehicles. Featuring an airtight self-locking seal, zero air loss quick-release, and a 360° swivel with extended reach, it’s optimized for inline tire inflator gauges with 1/4” NPT fittings. Built with over 35 years of industry expertise and backed by a lifetime warranty, this chuck delivers precision, speed, and durability for serious tire maintenance pros.

Specifications

Manufacturer	JACO Superior Products
Brand	JACO Superior Products
Item model number	T-Series
Manufacturer Part Number	T-Series
Special Features	Open flow chucks are not suggested for direct connection to air compressor hose, Open flow design allows air to flow freely through chuck, even when not engaged with valve stem, Patented internal automatic locking clamps provide airtight seal to tire valve, Quick-release valve rapidly disconnects from tire with zero air loss, Recommended for setup with in-line tire inflator or filler gauge for inflation with air compressor
Safety Rating	NIST, ANSI
Rim Diameter	7 Inches
Voltage	12 Volts
Item Weight	100 g

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