Upgrade your heavy-duty tire service setup with the Haltec 377 Lock-On Air Chuck. Engineered specifically for high-capacity workflows, this heavy-duty, straight long-reach chuck provides a secure, hands-free connection to large bore and super large bore valve stems. It is the ideal inflation solution for commercial trucks, OTR (Off-the-Road) vehicles, agricultural equipment, and mining machinery.

Features & Benefits

• Hands-Free Operation: The positive lock-on mechanism firmly grips valve stem threads when cocked, eliminating the need to hold the chuck in place during high-pressure inflation cycles.
• Extended Reach Design: Straight, elongated profile easily accesses recessed, dual-wheel, or deep-set valve stems on heavy industrial machinery.
• Blow-Out Resistant: Features a rugged, heavy-duty internal seat design built to withstand demanding shop environments and prevent air leaks under pressure.
• High-Flow Efficiency: Optimized internal geometry ensures rapid airflow to inflate large-volume tires quickly, reducing vehicle downtime.

Technical Specifications

• Brand / Manufacturer: Haltec Corporation
• Model Number: 377
• Inlet Thread Size: 1/4" NPT Female
• Valve System Fitment: Large Bore & Super Large Bore
• Maximum Pressure: 200 PSI
• Material Construction: Premium Nickel-Plated Brass
• Orientation: Straight (Long Reach)

Typical Applications

• Commercial fleet maintenance and semi-truck servicing
• Earthmoving, mining, and heavy construction equipment (OTR)
• Tractors and heavy agricultural machinery
• Industrial high-pressure and high-volume tire inflation systems

• Specifications