Proto J5271HAM 8mm 6-point 3/8 Drive Hand Socket

Product Description

The PROTO J5271HAM is a 6-point hand socket designed for professional-grade fastener work. Built from alloy steel with a chrome-plated finish, it accepts an 8 mm fastener and is driven by a standard 3/8 inch drive ratchet or breaker bar. The 6-point geometry distributes torque evenly across the flat faces of a hex fastener, reducing the risk of rounding under load. At 1-49/64 inches in overall length, it fits into moderately tight spaces without requiring a deep socket profile. Licensed tradespeople and experienced mechanics reach for this socket in automotive, HVAC equipment, and light industrial assembly applications where precise torque application and fastener protection matter.

This socket suits residential and commercial service work wherever 8 mm hex fasteners appear, including HVAC equipment panels, compressor mounting hardware, and automotive underhood components. The 3/8 inch drive size is the standard choice for medium-duty fastener work, pairing with a wide range of ratchets, torque wrenches, and extensions already in a professional toolkit. It is sold individually and is intended for hand-drive use only.

Key Features

• 6-point socket geometry reduces fastener rounding under torque load
• Alloy steel construction provides strength for repetitive professional use
• Chrome-plated finish resists corrosion and simplifies cleanup
• 3/8 inch drive accepts standard ratchets, torque wrenches, and extensions
• 1-49/64 inches overall length fits moderately confined fastener locations
• Meets ASME B107.5M dimensional and performance standards

Compatibility

Designed for use with any 3/8 inch drive ratchet, torque wrench, or extension bar. Compatible with 8 mm hex fasteners across automotive, HVAC, and general mechanical service applications. Not tether capable.

Installation Notes

This is a hand socket intended for use with manual drive tools only — do not use in an impact driver or impact wrench. Ensure the drive square is fully seated before applying torque to avoid socket or fastener damage. Inspect the socket for cracks or deformation before each use, and replace any damaged tooling immediately per standard shop safety practice.