Paramount PAR37218 Hex Key 5/8 Inch Short Arm

Product Description

The PARAMOUNT PAR37218 is a short-arm hex key sized at 5/8 inch, built for high-torque fastener work in tight spaces. It is machined from Protanium High Torque Steel, a material engineered to resist rounding and torsional failure under heavy load. The overall length measures 6-19/64 inches, and the hex end engages fasteners directly without an intermediate socket or adapter. This tool is used by HVAC technicians, plumbers, electricians, and mechanical contractors whenever a hex-drive fastener must be seated or broken loose in a confined area.

The short-arm configuration makes this key well-suited to panel interiors, equipment access compartments, and anywhere a long-arm tool would foul on surrounding structure. The 5/8 inch hex size covers a range of heavy-duty fasteners commonly found on commercial HVAC equipment, pump housings, valve bodies, and mechanical assemblies. A gray handle aids visual identification in a tool pouch. Single-piece construction with no moving parts means no maintenance between uses.

Key Features

• 5/8 inch hex size for large-format hex-drive fasteners
• Short-arm style provides clearance in confined or restricted spaces
• Protanium High Torque Steel resists torsional failure and fastener rounding
• Overall length of 6-19/64 inches keeps the tool compact without sacrificing leverage
• Hex end type engages fasteners directly for positive drive
• Gray handle for quick identification in a multi-tool pouch

Compatibility

Designed as a general-purpose short-arm hex key for use with any 5/8 inch hex-drive fastener in industrial, commercial, or mechanical service applications.

Installation Notes

This tool is used by licensed mechanical, HVAC, and plumbing technicians across service and installation work. Always de-energize or lock out equipment before accessing internal fasteners on powered systems. Ensure the hex end is fully seated in the fastener socket before applying torque to avoid cam-out or fastener damage. Inspect the key for wear or deformation before each use on critical fasteners.