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The WILLIAMS COMFORT PRODUCTS QJSD12A is a fixed square drive torque wrench head designed for use with compatible torque wrench handles that accept a J-type shank. The head features a 3/8 inch drive and a 0.425 inch J-type shank, allowing it to deliver controlled torque output up to 60 foot-pounds. This type of interchangeable torque head is used by mechanics, HVAC technicians, plumbers, and other trade professionals who require precise fastener torque in confined or specialized applications where a standard fixed-handle wrench is impractical.
The QJSD12A is suited for light-to-medium duty fastening tasks across residential and commercial service work. Its compact fixed square drive profile makes it appropriate for use in tight service spaces where a full-length torque wrench cannot be positioned. It is sold as a single unit and is compatible with J-shank torque wrench handle systems that accept interchangeable heads.
Designed for use with J-shank interchangeable torque wrench handle systems that accept a 0.425 inch J-type shank connection.
Installation and use of this torque wrench head should be performed by a qualified tradesperson familiar with proper torque procedures. Ensure the J-shank is fully seated and locked into the torque handle before applying load. Do not exceed the 60 foot-pound maximum torque rating. Inspect the shank and drive for wear or damage before each use.
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