Williams Comfort Products JHWISFXT620 Flextension 3/8 Drive

Product Description

The WILLIAMS COMFORT PRODUCTS JHWISFXT620 is a Flextension socket extension combining a drive extension and socket into a single integrated unit with a non-removable design. Built for 3/8 inch drive applications, it accepts a 5/8 inch fastener via a 6-point SUPERTORQUE lobular opening that delivers increased turning power while protecting fastener heads from deformation. Rated to a maximum working torque of 160 ft-lbs (1,920 in-lbs / 217 Nm), this tool is manufactured in the U.S.A. with a durable Black Oxide finish. It is designed for use with hand tools and power tools running impulse or direct drive — not for use with impact tools.

The JHWISFXT620 Flextension is suited to engine assembly, heavy equipment manufacturing, and mechanical repair operations where socket separation from an extension is a workflow liability. The integrated design eliminates the risk of the socket disconnecting during continuous production or repetitive assembly tasks. The drive end features a 7/32 inch cross hole bevel for easier installation, and the unit articulates up to 30 degrees for off-angle fastener access in tight or obstructed workspaces.

Key Features

• Integrated non-removable socket and extension design prevents socket dropout during use
• SUPERTORQUE lobular 6-point socket opening increases turning power without deforming fastener heads
• Maximum working torque: 160 ft-lbs / 1,920 in-lbs / 217 Nm
• Up to 30-degree angle offset for off-axis fastener access
• TIG-welded socket retention pin delivers full rotational power transfer
• 7/32 inch cross hole bevel on drive end for ease of installation
• Black Oxide finish for corrosion resistance
• Made in the U.S.A.

Compatibility

Designed for use with 3/8 inch drive hand tools and power tools operating in impulse or direct drive mode. Not compatible with impact tools.

Installation Notes

This Flextension is intended for installation by mechanics and assembly technicians working on engine or heavy equipment applications. Confirm the drive tool is a hand or direct-drive power tool before use — impact tool use is not supported and may damage the unit. Ensure the fastener size matches the 5/8 inch socket opening before applying torque. Do not exceed the rated maximum working torque of 160 ft-lbs.

Technical Specifications

• Drive Size: 3/8 inch
• Socket Size: 5/8 inch
• Point Configuration: 6-Point
• Maximum Working Torque: 160 ft-lbs / 1,920 in-lbs / 217 Nm
• Angle Offset: Up to 30 degrees
• Drive End Cross Hole: 7/32 inch bevel
• Finish: Black Oxide
• Weight: 0.55 pounds
• Country of Origin: U.S.A.

Standard Information

• Brand: WILLIAMS COMFORT PRODUCTS
• Manufacturer Part Number: JHWISFXT620