Paramount PAR37118 Hex Key 5/8 Inch Long Arm

Product Description

The PARAMOUNT PAR37118 is a long-arm hex key sized at 5/8 inch, designed for high-torque fastener applications in trade and industrial settings. Built from Protanium High Torque Steel, this hex key delivers the strength needed to drive large fasteners without rounding or deforming the tool. The long arm style provides extended reach and increased leverage compared to standard-arm designs. With an overall length of 9-51/64 inches, it fits comfortably in hand and reaches into recessed hex-socket fasteners. HVAC technicians, plumbers, pipefitters, and millwrights commonly use hex keys of this size for equipment assembly, valve service, and mechanical installations.

This hex key is suited for residential and commercial service work where 5/8 inch hex-socket fasteners are common. The long arm configuration is particularly useful in confined spaces or where extra torque is needed to break loose seized fasteners. It is appropriate for use on HVAC equipment panels, pump assemblies, valve bodies, and similar mechanical hardware requiring a 5/8 inch hex drive. Package quantity is one piece.

Key Features

• Protanium High Torque Steel construction for superior strength and durability
• 5/8 inch hex end fits standard hex-socket fasteners
• Long arm style provides extended reach and added leverage
• Overall length of 9-51/64 inches for comfortable grip and deep-reach access
• Gray handle for easy identification in a tool set
• Inch measurement system; single-piece package

Compatibility

Designed as a standard 5/8 inch long-arm hex key for use with any hex-socket fastener requiring a 5/8 inch drive in inch-measurement applications.

Installation Notes

No power shutoff is required for hand tool use, but always de-energize and isolate any equipment before servicing fasteners on electrical, HVAC, or plumbing assemblies. Apply steady, controlled torque to avoid slipping off the fastener head. Inspect the hex key for wear or deformation before each use and replace if the hex end shows signs of rounding.