Williams Comfort Products QJRXSM12A Torque Wrench Head 12MM

Product Description

The WILLIAMS COMFORT PRODUCTS QJRXSM12A is a 12 MM metric flare nut torque wrench head designed for precise fastening in tight or recessed fittings. Built with a 6-point contact design, it delivers full engagement on flare nut hex profiles, reducing the risk of rounding fasteners under load. The J-type shank measures 0.425 inches and accepts compatible torque wrench drives. Maximum rated torque is 50 ft-lb. This head is used by HVAC technicians, plumbers, and pipefitters working on refrigerant lines, fuel connections, and hydraulic fittings where controlled torque on metric flare nuts is required.

This torque wrench head fits residential and light commercial service applications where metric flare nut fasteners are encountered. It is well-suited for refrigerant line set connections, gas supply fittings, and other tubing assemblies that require a calibrated torque value. The 12 MM size addresses a common fastener dimension found on metric-spec equipment. Technicians carrying a full torque wrench head set will find this a practical addition for service calls on imported or metric-spec systems.

Key Features

• 12 MM flare nut head for metric fastener applications
• 6-point contact geometry for full hex engagement and reduced fastener damage
• J-type shank at 0.425 inches for compatible torque wrench drive attachment
• Maximum torque rating of 50 ft-lb suits typical flare nut fastening requirements
• Compact profile — 0.4 inches long, 3 inches wide, 0.7 inches tall — fits in confined service areas
• Sold individually; lightweight at 0.09 pounds for easy kit integration

Compatibility

Designed for use with J-type shank torque wrench handles accepting a 0.425-inch shank. Confirm drive compatibility with your torque wrench handle before installation.

Installation Notes

Installation of this torque wrench head should be performed by a qualified HVAC technician, plumber, or pipefitter familiar with torque fastening procedures. Ensure the system is depressurized and isolated before loosening or tightening any flare nut connections. Verify the J-type shank seats fully and locks into the torque wrench handle before applying torque. Follow applicable codes such as the IFGC or equipment manufacturer torque specifications when fastening gas or refrigerant fittings.

Technical Specifications

• Head Size: 12 MM
• Head Type: Flare Nut
• Point Type: 6 Point
• Maximum Torque: 50 ft-lb
• Shank Type: J
• Shank Size: 0.425 inches
• Length: 0.4 inches
• Width: 3 inches
• Height: 0.7 inches
• Weight: 0.09 pounds
• UPC: 662459934635

Standard Information

• Brand: WILLIAMS COMFORT PRODUCTS
• Manufacturer Part Number: QJRXSM12A