Proto J54415/16XL Hex Bit Socket 1/2 in Drive 5/16 in

Product Description

The PROTO J54415/16XL is a long hex bit socket designed for hand tool applications requiring extended reach and precise torque transfer. It accepts a 1/2 inch square drive and fits 5/16 inch internal hex fasteners. With an overall length of 5-5/8 inches and a bit length of 4-1/8 inches, this socket gives technicians the clearance needed to drive recessed or deep-set hex fasteners that standard-length sockets cannot reach. Licensed tradespeople working on HVAC equipment, refrigeration units, electrical enclosures, and mechanical assemblies rely on this type of extended socket when fastener access is limited by surrounding components.

This socket is suited for maintenance and installation tasks across HVAC, plumbing, and general mechanical service work. The long-body design is particularly useful when driving hex-head screws or bolts seated in deep channels, behind panels, or inside equipment frames. It is intended for use with 1/2 inch drive ratchets, breaker bars, and torque wrenches in both shop and field environments.

Key Features

• 1/2 inch square drive fits standard ratchets, extensions, and torque wrenches
• 5/16 inch hex size with metric equivalent of 7.9375 mm
• Extended overall length of 5-5/8 inches for deep or obstructed fastener access
• 4-1/8 inch bit length provides extra reach over standard hex bit sockets
• Long hex bit socket classification — designed for reach-critical applications

Compatibility

Designed as an OEM-style replacement or service-grade hand tool compatible with any 1/2 inch drive ratchet or drive tool and sized for 5/16 inch internal hex fasteners found in mechanical, HVAC, and electrical equipment.

Installation Notes

Install and remove with a 1/2 inch drive ratchet, breaker bar, or torque wrench. Ensure the drive tool is fully seated before applying torque to avoid rounding the hex engagement. Power down or de-energize any equipment before accessing fasteners inside electrical or HVAC panels. Inspect the socket for wear or cracking before each use and replace if the hex engagement shows deformation.