Proto J5550 Hand Socket 1-9/16 in 12-pt 3/4 Drive

Product Description

The PROTO J5550 is a 12-point hand socket designed for use with a 3/4 inch drive ratchet or breaker bar. Built from alloy steel with a chrome-plated finish, it accepts 1-9/16 inch fasteners and measures 2-5/8 inches in overall length. The standard-length profile fits common hex-head bolts and nuts encountered in heavy mechanical, industrial, and fleet maintenance work. This socket meets ASME B107.110-2012 and SAE AS954G standards, confirming dimensional accuracy and torque performance for professional use. Licensed tradespeople and shop mechanics rely on it for demanding fastening applications.

The J5550 is suited for commercial and industrial maintenance tasks where a 3/4 inch drive is required to develop high torque on large fasteners. Typical applications include heavy equipment service, structural assembly, truck and fleet repair, and industrial machinery maintenance. The 12-point design engages fasteners at multiple contact points, allowing use in tighter swing arcs compared to 6-point alternatives. The chrome finish resists corrosion and simplifies cleanup in shop environments.

Key Features

• 1-9/16 inch socket size fits large hex-head fasteners common in heavy mechanical work
• 12-point geometry allows engagement at 30-degree increments for use in confined spaces
• 3/4 inch square drive compatible with standard 3/4 drive ratchets, breaker bars, and torque wrenches
• Alloy steel construction provides durability under high-torque conditions
• Chrome-plated finish resists corrosion and simplifies surface cleaning
• Meets ASME B107.110-2012 and SAE AS954G standards for dimensional and performance compliance

Compatibility

Designed for use with 3/4 inch drive tools including ratchets, breaker bars, and torque wrenches. Fits 1-9/16 inch hex-head fasteners in standard-length socket applications.

Installation Notes

Installation and removal should be performed by a qualified mechanic or maintenance technician using a properly rated 3/4 inch drive tool. Ensure the drive tool torque rating is appropriate for the fastener application before applying load. This socket is not tether capable and should not be used in elevated or overhead work environments where drop hazards are a concern. Inspect the socket for cracks or wear before each use and remove from service if damage is found.