Williams Comfort Products JHW4M-621 Impact Socket 21MM

Product Description

The WILLIAMS COMFORT PRODUCTS JHW4M-621 is a metric shallow impact socket designed for professional-grade fastening work. Built with a 1/2 inch drive and a 21 MM opening, it fits standard impact wrench setups used by mechanics and tradespeople across industrial and commercial applications. The socket features lobular internal geometry engineered to maximize torque transfer while reducing stress on fastener heads. Specially heat treated for impact use, this socket is rated for both pneumatic and electric impact wrenches. At 0.34 pounds and 1.5 inches in overall length, it is a compact, durable tool built for repeated high-cycle use.

This shallow impact socket is suited for professional service environments where space is limited and a full-depth socket is not required. Common applications include automotive service, HVAC equipment assembly, and general mechanical maintenance where metric 21 MM fasteners are encountered. The 1/2 inch drive size is the most common heavy-duty drive standard in professional tooling, making this socket compatible with a wide range of impact wrenches and drive accessories already in the field.

Key Features

• Lobular internal openings maximize turning power without deforming fastener heads
• Designed for maximum engagement on 6-point fasteners
• Compatible with pneumatic and electric impact wrenches
• Specially heat treated for impact use, improving service life and safety
• Shallow profile for use in confined spaces
• 1/2 inch drive with 21 MM metric opening

Compatibility

Designed as an OEM-style replacement and professional-grade option for use with standard 1/2 inch drive pneumatic and electric impact wrenches accepting metric shallow impact sockets.

Installation Notes

This socket is intended for installation and removal tasks performed by qualified mechanics or trade technicians. Always ensure the socket is fully seated on the fastener and impact wrench anvil before applying torque. Inspect the socket for cracks or wear before each use, and do not use damaged sockets under impact loads. Standard impact wrench operating procedures and applicable safety codes should be followed at all times.

Technical Specifications

• Drive Size: 1/2 inch
• Socket Opening: 21 MM metric
• Overall Length: 1.5 inches
• Weight: 0.34 pounds
• Socket Type: Shallow Impact
• Point Configuration: 6-point
• UOM: Each
• UPC: 662459253613

Standard Information

• Brand: WILLIAMS COMFORT PRODUCTS
• Manufacturer Part Number: JHW4M-621