Proto J52055MH 5mm 6-point 3/8 Drive Hand Socket

Product Description

The PROTO J52055MH is a 5 mm, 6-point hand socket designed for standard 3/8 inch drive ratchets and extensions. Built from alloy steel with a chrome-plated finish, it delivers reliable torque transfer on hex fasteners while resisting corrosion in shop and field environments. The 6-point geometry grips fastener flats rather than corners, reducing the risk of rounding. Overall length is 1-3/32 inches, making it a standard-length socket suitable for the majority of fastening applications encountered by mechanics, millwrights, and maintenance technicians.

This socket is suited for general mechanical service work in automotive, industrial, and equipment maintenance settings. The 5 mm size targets small fasteners commonly found on import vehicles, electronics housings, small engine components, and precision machinery. It is typically used by automotive technicians, fleet mechanics, and industrial maintenance pros who require a reliable metric socket for 3/8 inch drive tooling setups.

Key Features

• 5 mm socket size for metric fastener applications
• 6-point design grips fastener flats to reduce rounding under load
• 3/8 inch drive compatible with standard ratchets and extensions
• Alloy steel construction for durability under repeated torque cycles
• Chrome-plated finish for corrosion resistance and easy cleaning
• Meets ASME B107.5M standards for hand socket performance
• Limited lifetime warranty from the manufacturer

Compatibility

Designed for use with standard 3/8 inch drive ratchets, extensions, and torque wrenches. Compatible with any 3/8 inch drive hand tool setup accepting standard metric hand sockets.

Installation Notes

This socket is installed and removed by hand as part of a 3/8 inch drive tool assembly. Ensure the drive connection is fully seated before applying torque to prevent slippage or damage to the socket or fastener. Inspect the socket for cracks or wear before each use, and replace if the drive square or socket opening shows signs of deformation. Not tether capable — use appropriate securing methods when working at elevation.