Proto J54419/16XL Hex Bit Socket 1/2 in Drive 9/16 in

Product Description

The PROTO J54419/16XL is a long hex bit socket designed for hand tool use in professional trade and industrial applications. It accepts a 1/2 inch square drive and features a 9/16 inch hex bit measuring 5.375 inches in bit length with an overall length of 7.125 inches. The extended length design provides reach into deep or recessed fastener locations that standard-length sockets cannot access. This socket is appropriate for HVAC service, mechanical contractors, pipefitters, and general maintenance technicians who routinely work with hex-drive fasteners in confined or deep-set positions.

This socket suits applications where a standard-length hex bit socket lacks the reach required to engage a fastener fully. Common uses include equipment panel assembly, mechanical system fastening, and service work on HVAC units, pumps, and similar mechanical assemblies. The 9/16 inch hex size is a common fastener dimension across commercial and industrial equipment, making this socket a practical addition to a professional hand tool set.

Key Features

• Long hex bit socket configuration for extended reach into recessed fastener locations
• 1/2 inch square drive compatible with standard 1/2 inch drive ratchets, breaker bars, and extensions
• 9/16 inch hex bit size — 14.290 mm equivalent
• 5.375 inch bit length provides clearance over protruding bolt shafts or deep bosses
• 7.125 inch overall length for access in confined work areas

Compatibility

Designed for use with standard 1/2 inch drive hand tools including ratchets, torque wrenches, and breaker bars. Fits 9/16 inch internal hex fasteners.

Installation Notes

Install and remove using a 1/2 inch drive ratchet, torque wrench, or breaker bar. Ensure the hex bit is fully seated in the fastener recess before applying torque to prevent rounding. De-energize and lock out equipment before performing fastener service on powered machinery. Inspect the socket for wear or cracking before each use and replace if the drive or hex surfaces show deformation.