Proto J5220MH Hand Socket 20mm 3/8 Drive 6-point Chrome

Product Description

The PROTO J5220MH is a 20 mm, 6-point hand socket built on a 3/8-inch drive and finished in chrome plating. It is designed for standard-length fastener access in mechanical, maintenance, and assembly work. The 6-point geometry maximizes contact with fastener flats, reducing the risk of rounding under torque. At 0.18 pounds, the socket is compact and fits standard 3/8-inch drive ratchets, extensions, and breaker bars. It meets ASME B107.5 dimensional and performance standards. Technicians in automotive, industrial, and general maintenance trades reach for this socket when working with metric fasteners in the 20 mm range.

This socket suits residential, commercial, and fleet service environments where metric fasteners are common. It is appropriate for underhood automotive work, HVAC equipment assembly, pump and motor service, and general mechanical maintenance. The standard length profile fits most open-access fastener locations. It is packaged individually and pairs with any 3/8-inch drive ratchet or torque wrench in a standard tool set.

Key Features

• 20 mm socket size for metric fastener applications
• 3/8-inch drive compatible with standard ratchets, extensions, and torque wrenches
• 6-point design maximizes flat contact and reduces fastener rounding
• Chrome-plated finish resists corrosion and simplifies cleaning
• Standard length profile suits most open-access fastener locations
• Meets ASME B107.5 dimensional and performance standards

Compatibility

Designed as a standard OEM-style 3/8-inch drive hand socket compatible with 3/8-inch drive ratchets, torque wrenches, and extension bars from any manufacturer conforming to ASME B107.5 drive dimensions.

Installation Notes

Installation and use of this socket should be performed by qualified mechanics or maintenance technicians familiar with proper torque practices. Always ensure the socket is fully seated on the fastener before applying torque to prevent slippage. Inspect the socket for cracks or wear before each use and remove from service if damage is found. Follow applicable equipment manufacturer torque specifications when using with a torque wrench.