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The PROTO J5407A is a standard slotted screwdriver socket designed for 1/2 inch square drive ratchets and impact tools. The blade measures 7/16 inches wide by 0.07 inches thick, making it suited for medium to large slotted fasteners. Overall length is 3-5/32 inches, providing reach into recessed fastener locations without requiring an extension in many applications. The socket weighs 0.19 pounds and is built for repeated professional use in mechanical, HVAC, plumbing, and electrical trade work where slotted drive fasteners are still common on equipment panels, junction boxes, and legacy hardware.
This socket is used wherever a 1/2 inch drive tool set needs slotted screwdriver capability. Typical applications include service panels, electrical enclosures, HVAC equipment cabinets, and plumbing fixture hardware that still uses large slotted fasteners. It accepts standard 1/2 inch drive ratchets, breaker bars, and torque wrenches, and fits into most standard socket trays and drive sets. Suited for both shop and field use by licensed tradespeople working on commercial and residential equipment.
Designed as an OEM-style replacement and standard-fit socket for any 1/2 inch square drive ratchet or drive tool system requiring slotted screwdriver bit capability.
Install and remove with the drive tool fully seated on the socket to prevent slippage and fastener damage. Ensure the blade width and thickness match the fastener slot before applying torque to avoid cam-out or slot damage. Inspect the blade tip for wear before use on finished or sensitive hardware surfaces. No power source needs to be removed for socket use, but always de-energize electrical panels and shut off equipment before servicing fasteners on live systems.
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