Williams Comfort Products QZO56A Torque Wrench Head

Product Description

The WILLIAMS COMFORT PRODUCTS QZO56A is an open-end torque wrench head designed for precision fastener work in demanding trade and industrial applications. Built to accept a Z-type shank with a 0.990-inch shank diameter, it delivers a maximum torque output of 480 foot-pounds, making it suitable for heavy-duty bolting tasks where accurate torque control is critical. The 1 3/4-inch open-end head size and a center-of-fastener-to-retaining-pin measurement of 5.75 inches allow access to fasteners in a range of tight or offset installation scenarios. Mechanics, pipefitters, and millwrights who require controlled torque on large fasteners will find this head fits into a standard torque wrench drive system without modification.

This torque wrench head is suited for use in commercial and industrial environments where large-diameter fasteners require controlled tightening. Typical applications include flange bolting, heavy mechanical assembly, and equipment installation in HVAC, plumbing, and industrial maintenance settings. It is sold as a single unit and is intended for use with compatible Z-shank torque wrench handles. SAE sizing makes it appropriate for work on standard inch-measurement fasteners commonly found in North American mechanical systems.

Key Features

• 1 3/4-inch open-end head for SAE fasteners
• Maximum torque rating of 480 foot-pounds for heavy-duty applications
• Z-type shank with 0.990-inch shank diameter for secure drive connection
• Center of fastener to retaining pin measures 5.75 inches for offset access
• Compact profile at 0.87 inches height for use in confined spaces

Compatibility

Designed for use with Z-shank torque wrench handles that accept a 0.990-inch shank diameter. Confirm shank type and drive compatibility with your existing torque wrench handle before installation.

Installation Notes

Installation of this torque wrench head should be performed by a qualified mechanic or tradesperson familiar with torque fastening procedures. Ensure the wrench handle is fully de-energized or relieved of any preload before attaching or removing the head. Verify that the shank seats fully and the retaining pin engages securely prior to applying torque. Follow applicable industry torque standards and job-site specifications when tightening fasteners.

Technical Specifications

• Head Size: 1 3/4 inches
• Head Type: Open End
• Shank Size: 0.990 inches
• Shank Type: Z
• Maximum Torque: 480 foot-pounds
• Center of Fastener to Retaining Pin: 5.75 inches
• Length: 7.88 inches
• Width: 3.55 inches
• Height: 0.87 inches
• Weight: 2.41 pounds
• Standard: SAE
• Sold As: Each

Standard Information

• Brand: WILLIAMS COMFORT PRODUCTS
• Manufacturer Part Number: QZO56A