Williams Comfort Products QJRXS12A Torque Wrench Head 3/8 in

Product Description

The WILLIAMS COMFORT PRODUCTS QJRXS12A is a 3/8 inch flare nut torque wrench head designed for precise fastening in plumbing, HVAC, and refrigeration applications. It features a 6-point contact design and accepts a J-type shank measuring 0.425 inches. The head delivers a maximum torque of 29 ft-lb, making it well-suited for SAE flare nut fittings where controlled tightening is critical. Tradespeople reaching for reliable torque control on refrigerant line connections and gas fittings will find this head a practical addition to a torque wrench set.

This torque wrench head is used when technicians need accurate torque application on SAE flare nut connections in residential and light commercial systems. Typical scenarios include tightening refrigerant line fittings on split systems and connecting gas supply lines where over-tightening or under-tightening can cause leaks or component damage. The J-type shank and 6-point geometry provide solid engagement with standard SAE flare nuts.

Key Features

• 3/8 inch flare nut head for SAE flare nut fittings
• 6-point contact design for positive engagement and reduced fastener rounding
• J-type shank with 0.425 inch shank diameter
• Maximum torque rating of 29 ft-lb
• Compact profile: 3.03 inches long, 0.59 inches wide, 0.79 inches tall
• Lightweight at 0.16 pounds for easy single-hand use in tight spaces

Compatibility

Designed for use with J-type drive torque wrenches and compatible with standard SAE flare nut fastener sizes at 3/8 inch across plumbing, HVAC, and refrigeration applications.

Installation Notes

Installation should be performed by a licensed HVAC technician, refrigeration mechanic, or plumber familiar with torque specifications for flare nut fittings. Always shut off the system and relieve line pressure before disconnecting or tightening any fittings. Verify the torque wrench is calibrated and that the J-type shank is fully seated before applying torque. Do not exceed the maximum torque rating of 29 ft-lb to avoid damaging flare seats or fittings.

Technical Specifications

• Head Size: 3/8 inch
• Head Type: Flare Nut
• Point Type: 6 Point
• Shank Type: J
• Shank Size: 0.425 inches
• Maximum Torque: 29 ft-lb
• Length: 3.03 inches
• Width: 0.59 inches
• Height: 0.79 inches
• Weight: 0.16 pounds
• Standard: SAE

Standard Information

• Brand: WILLIAMS COMFORT PRODUCTS
• Manufacturer Part Number: QJRXS12A