Milwaukee Tool 42-04-9111 Socket Adapter 1/2 to 3/8 Drive

Product Description

The MILWAUKEE TOOL 42-04-9111 is a square drive socket adapter that converts a 3/8 inch female drive to a 1/2 inch male drive, allowing a hand ratchet or breaker bar to drive 1/2 inch sockets. Built from 31CrV3 chromium-vanadium steel with a chrome finish, this adapter is compact at 1.40 inches overall length and weighs 0.12 pounds. It is designed for trade professionals and skilled tradespeople who need to step up drive sizes without switching ratchets. The square drive on both the male and female ends ensures a secure, positive engagement during torque application.

This adapter is suited for use in mechanical, HVAC, plumbing, and electrical service work where different socket drive sizes are required on the same job. It fits standard hand ratchets and breaker bars with a 3/8 inch square drive output and accepts 1/2 inch square drive sockets. The compact 1.40 inch length keeps the tool profile low in tight spaces. It ships as a single unit and is appropriate for both shop and field use.

Key Features

• Converts 3/8 inch female square drive to 1/2 inch male square drive
• 31CrV3 chromium-vanadium steel construction for durability under torque
• Chrome finish resists corrosion and surface wear
• Compact 1.40 inch overall length for use in confined areas
• Square drive on both ends ensures positive engagement with ratchets and sockets

Compatibility

Designed to increase the drive size of a hand ratchet from 3/8 inch to 1/2 inch. Compatible with standard 3/8 inch square drive ratchets and breaker bars on the female end, and accepts standard 1/2 inch square drive sockets on the male end.

Installation Notes

Installation requires no tools beyond the adapter itself. Ensure the ratchet or breaker bar is fully seated into the 3/8 inch female end and the socket is fully seated onto the 1/2 inch male end before applying torque. Do not use this adapter with impact drivers or impact wrenches, as it is not rated for impact use. Inspect the adapter for cracks or wear before each use.