Williams Comfort Products QZO42A Torque Wrench Head

Product Description

The WILLIAMS COMFORT PRODUCTS QZO42A is an open-end torque wrench head designed for precision fastening in demanding trade applications. Built to a 1 5/16 inch open-end head size, it accommodates a Z-type shank with a 0.990 inch shank diameter and delivers a maximum torque output of 480 ft-lb. The center of fastener to retaining pin measures 5 3/4 inches. This wrench head is intended for use with compatible torque wrench drives and is suited for mechanical, HVAC, and industrial service work where controlled torque is required on large fasteners.

This torque wrench head is appropriate for residential and commercial service environments where high-torque fastening tasks are performed. It is commonly used by HVAC technicians, pipefitters, and industrial mechanics working on equipment that demands accurate torque application to large SAE fasteners. Its open-end design allows access to fasteners in confined or partially obstructed locations where a closed wrench head would not fit.

Key Features

• 1 5/16 inch open-end head for large SAE fastener applications
• Maximum torque rating of 480 ft-lb for heavy-duty fastening
• Z-type shank with 0.990 inch shank diameter for drive compatibility
• Center of fastener to retaining pin: 5 3/4 inches
• Compact profile at 0.55 inch height for use in tight clearances
• Lightweight construction at 1.45 pounds for extended use

Compatibility

Designed for use with torque wrench drives accepting a Z-type shank at 0.990 inch diameter. Verify shank interface compatibility with the drive tool before installation.

Installation Notes

Installation should be performed by a qualified mechanic or service technician familiar with torque wrench tooling. Ensure the shank is fully seated and the retaining pin is properly engaged before applying torque. Do not exceed the rated maximum torque of 480 ft-lb to avoid tool damage or fastener failure. Inspect the wrench head for wear or damage before each use.

Technical Specifications

• Head Size: 1 5/16 inches
• Head Type: Open End
• Shank Size: 0.990 inches
• Shank Type: Z
• Maximum Torque: 480 ft-lb
• Center of Fastener to Retaining Pin: 5 3/4 inches
• Standard: SAE
• Length: 7.68 inches
• Width: 2.64 inches
• Height: 0.55 inches
• Weight: 1.45 pounds

Standard Information

• Brand: WILLIAMS COMFORT PRODUCTS
• Manufacturer Part Number: QZO42A