Proto J5520M 20mm 12-point 3/4 Drive Hand Socket

Product Description

The PROTO J5520M is a 20 mm, 12-point hand socket designed for professional-grade fastener work in mechanical, industrial, and maintenance applications. Built from alloy steel with a chrome-plated finish, this socket offers corrosion resistance and durability under daily shop use. It features a 3/4 inch drive and a standard length of 2 inches overall, making it a reliable choice for accessing larger fasteners where controlled torque application is required. Licensed tradespeople and experienced technicians rely on this socket for its consistent fit and ASME-rated construction.

This socket is suited for heavy-duty mechanical work involving 20 mm fasteners common in industrial equipment, fleet maintenance, and large-format machinery. The 3/4 inch drive pairs with standard 3/4 inch drive ratchets, breaker bars, and torque wrenches. Its standard length profile fits most general-access fastener scenarios without requiring an extension. Sold individually, it is appropriate as a replacement or supplementary addition to an existing socket set.

Key Features

• 20 mm socket size with 12-point design for increased contact points on hex fasteners
• 3/4 inch drive for use with heavy-duty drive tools and torque wrenches
• Alloy steel construction for high strength and impact resistance
• Chrome-plated finish provides corrosion resistance and ease of cleaning
• Standard length at 2 inches overall for general-access fastener applications
• Meets ASME B107.110-2012 standards for hand socket performance and dimensions

Compatibility

Designed for use with 3/4 inch drive ratchets, breaker bars, and torque wrenches accepting standard 3/4 inch drive sockets.

Installation Notes

Ensure the drive tool is rated for the torque demands of the application before use. Inspect the socket for cracks or wear before each use, particularly at the drive square and socket walls. This socket is not tether capable and should not be used in elevated or overhead work environments where a dropped tool presents a hazard. No power-down procedure applies, but always confirm the fastener and mating drive tool are clean and properly seated before applying torque.