Proto J7428 Impact Socket 1/2 in Drive 7/8 in 12-point

Product Description

The PROTO J7428 is a 12-point impact socket designed for heavy-duty fastener work in professional trade and industrial environments. Built for a 1/2 inch drive, it accepts a 7/8 inch fastener and measures 1.625 inches in overall length. The 12-point design engages hex fasteners from multiple positions, reducing repositioning time on the job. Licensed mechanics, ironworkers, pipefitters, and maintenance technicians reach for impact sockets like this one when running an impact wrench on stubborn or high-torque fasteners where hand-socket walls would crack or deform under load.

This socket is suited for automotive, heavy equipment, and industrial maintenance applications where a 1/2 inch drive impact wrench is the standard tool. The 7/8 inch size covers a common fastener size found on machinery frames, structural connections, and drivetrain components. It fits standard 1/2 inch drive impact wrenches and extensions used across automotive shops, fleet maintenance bays, and field service work.

Key Features

• 1/2 inch drive fits standard impact wrench anvils and extension bars
• 7/8 inch socket size for a common industrial and automotive fastener
• 12-point geometry allows engagement from multiple positions on hex fasteners
• Compact 1.625 inch overall length suited for tight-clearance applications
• Impact-rated construction handles the shock loads produced by pneumatic and electric impact wrenches

Compatibility

Designed as an OEM-style replacement and standard-fit impact socket for 1/2 inch drive impact wrenches and drive accessories across professional tool systems.

Installation Notes

Impact sockets must be used with impact wrenches or impact-rated drive tools only — never use impact sockets with a torque wrench or standard ratchet for precision torque work, as the drive geometry differs. Ensure the socket is fully seated on the fastener and the detent ball or retaining ring is engaged before applying power. Inspect the socket for cracks or deformation before each use and remove it from service if any are found.