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The PROTO J5546M is a universal flex hand socket designed for demanding trade applications where a rigid socket cannot maintain engagement. Built from chrome-plated steel, it features a 3/4 inch drive and accepts 46 mm fasteners through a 12-point configuration. The overall length is 2-31/32 inches. The universal joint design allows the socket to articulate off-axis, making it useful when a fastener is recessed, angled, or obstructed. Licensed HVAC technicians, pipefitters, electricians, and mechanical contractors reach for universal sockets when working in tight equipment bays or around structural obstructions. The chrome finish provides corrosion resistance for shop and field use. It meets ASME B107.110-2012 and SAE AS955 standards.
This socket is suited for residential and commercial mechanical work where 46 mm fasteners appear on heavy equipment, pumps, compressors, flanges, or structural connections. The 12-point profile provides multiple engagement positions, reducing the arc needed to turn a fastener in restricted clearance. The universal flex feature is particularly useful during equipment installation or replacement when direct drive access is limited. It is sold individually and carries no tether capability, making it a standard shop-use or field-service tool for tradespeople working across HVAC, plumbing, and general mechanical disciplines.
Designed as a standard 3/4 inch drive universal hand socket for use with any 3/4 in drive ratchet, torque wrench, or breaker bar requiring 46 mm fastener engagement.
Installation and removal of fasteners with this socket should be performed by a qualified tradesperson familiar with proper torque procedures for the application. Always ensure the drive tool is rated for 3/4 inch drive use and that the socket is fully seated on the fastener before applying force. De-energize and lock out equipment per applicable safety procedures before accessing fasteners on mechanical or electrical systems. Inspect the socket for cracks or wear before each use and remove from service if damage is found.
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