Williams Comfort Products JHW37721 Impact Socket 21mm

Product Description

The WILLIAMS COMFORT PRODUCTS JHW37721 is a metric deep impact socket designed for use with 1/2 inch drive impact wrenches and rattle guns. Built to the 6-point deep socket configuration, it accepts 21mm fasteners and measures 3.25 inches in overall length. The deep profile allows it to reach recessed or stud-mounted fasteners that standard-depth sockets cannot access. At 0.25 pounds, it is a lightweight addition to any trade tool kit. HVAC technicians, plumbers, and mechanical contractors will find this socket useful for equipment installation and service work involving metric hardware.

This socket is suited for residential and commercial service applications where metric fasteners are common — particularly on imported HVAC equipment, hydronic system components, pump assemblies, and mechanical equipment panels. The 21mm size covers a range of metric bolt and nut heads frequently found on equipment mounting hardware. The deep 6-point design reduces fastener rounding compared to 12-point configurations, making it the preferred choice when working with impact tools at higher torque output.

Key Features

• 6-point deep socket design minimizes fastener rounding under high-torque impact use
• 21mm metric sizing fits common hardware found on HVAC, plumbing, and mechanical equipment
• 1/2 inch drive compatible with standard impact wrenches and drive extensions
• 3.25 inch overall length provides reach for recessed and stud-mounted fasteners
• Lightweight at 0.25 pounds for reduced hand fatigue during extended use

Compatibility

Designed for use with standard 1/2 inch drive impact wrenches, extensions, and adaptors. Fits 21mm metric fasteners in deep-socket applications across a range of mechanical and trade service scenarios.

Installation Notes

This socket is intended for use with impact wrenches and should be paired with impact-rated drive accessories only — standard chrome sockets and non-impact extensions are not rated for impact tool use. Always ensure the socket is fully seated on the fastener before applying torque. Inspect the socket for cracks or deformation before each use, and replace if any damage is found. Follow equipment manufacturer guidelines and applicable mechanical codes when servicing trade equipment.

Technical Specifications

• Drive Size: 1/2 inch
• Socket Type: Deep Socket
• Point Style: 6-Point
• Socket Size: 21mm
• Overall Length: 3.25 inches
• Weight: 0.25 pounds
• UPC: 0662459318022

Standard Information

• Brand: WILLIAMS COMFORT PRODUCTS
• Manufacturer Part Number: JHW37721