Paramount PAR17554 Ball End Hex Key 2.50 Mm Long Arm

Product Description

The PARAMOUNT PAR17554 is a metric ball end hex key designed for fastener-driven service work in HVAC, plumbing, electrical, and mechanical trade applications. The ball end tip allows off-axis engagement with socket head fasteners, useful when working at an angle in tight equipment spaces. The long arm configuration provides increased torque leverage compared to standard-length keys. Manufactured from steel, this key measures 3-31/64 inches overall length and is built for repeated professional use. It is a single-piece, hand-held tool appropriate for any technician working with metric hardware.

This hex key is suited for service calls and installation work where metric socket head cap screws or set screws are present. Common applications include equipment panel fasteners, motor mounting hardware, pump assemblies, and access cover screws found in residential and light commercial HVAC units, pool equipment, and similar mechanical systems. The 2.50 mm hex size addresses smaller fasteners common in European and metric-spec components.

Key Features

• Ball end tip allows up to approximately 25-degree off-axis fastener engagement in confined spaces
• Long arm style increases torque leverage for stubborn or deep-set fasteners
• 2.50 mm metric hex size for precision fit on metric socket head fasteners
• Steel construction for durability under repeated service use
• 3-31/64 inch overall length fits standard tool pouches and service kits

Compatibility

Designed for use with 2.50 mm metric socket head cap screws and set screws found across a wide range of HVAC, plumbing, pool, and mechanical equipment assemblies.

Installation Notes

This tool is installed by hand and requires no additional tools or fasteners. Always select the correct hex size before applying torque to avoid rounding fastener sockets. When using the ball end tip, apply steady, controlled force to prevent slippage on precision or hardened fasteners. Store in a dry location to prevent corrosion on the steel tip.