Proto J15070 Impact Socket 1-1/2 in Drive 4-3/8 in 6-point

Product Description

The PROTO J15070 is a heavy-duty impact socket designed for high-torque fastening applications in industrial and mechanical service environments. Built around a 1-1/2 inch drive, it accepts a 4-3/8 inch hex fastener and features a 6-point contact geometry that maximizes load transfer to fastener flats while reducing the risk of rounding. The overall length of 5-3/4 inches provides the reach needed for recessed or flanged fastener locations. Licensed mechanics, millwrights, and heavy equipment technicians are the primary installers of this tool.

This socket is suited for heavy industrial applications where large-diameter hex fasteners are common, including equipment assembly, structural steel work, heavy truck and equipment service, and industrial machinery maintenance. The 1-1/2 inch drive interface is standard on high-capacity impact wrenches and torque multipliers used in these settings. The 4-3/8 inch socket size addresses fastener specifications found on large mechanical assemblies and industrial equipment.

Key Features

• 1-1/2 inch drive size compatible with heavy-duty impact wrenches and torque multipliers
• 4-3/8 inch socket size for large hex fasteners
• 6-point drive geometry concentrates force on fastener flats to reduce rounding
• 5-3/4 inch overall length provides reach in deep or recessed fastener locations
• Hex drive style for direct engagement on hex-head fasteners and bolts

Compatibility

Designed as an OEM-style impact socket for use with 1-1/2 inch drive impact wrenches, torque multipliers, and breaker bars in heavy industrial and mechanical service applications.

Installation Notes

Installation and removal of large-diameter fasteners with this socket should be performed by qualified mechanics or millwrights familiar with heavy-duty impact tooling. Verify that the drive tool's torque rating is appropriate for the fastener specification before applying load. Inspect the socket for cracks or deformation before each use and remove from service if damage is found. Never use impact sockets with hand-drive ratchets, as the material hardness is not suited for non-impact hand torque application.