3/8" Drive 6-Point Metric 21 mm Shallow Socket - J.H. Williams

The J.H. Williams JHWBM-621 3/8" Drive 6-Point Metric 21 mm Shallow Socket is a professional-grade tool from a manufacturer trusted by industrial technicians since 1882. Engineered for demanding automotive and industrial environments, this socket features SUPERTORQUE™ lobular openings that ensure greater turning power without deforming the fastener, providing reliable engagement and effective torque transfer on 21 mm fasteners. Its shallow profile is specifically designed to access fasteners in confined spaces where standard sockets cannot reach.

Key Features

• 3/8" Drive Compatibility: Integrates seamlessly with standard 3/8" drive ratchets, torque wrenches, and extensions, making it a versatile addition to any professional toolkit.
• 6-Point SUPERTORQUE™ Fastener Engagement: Designed with SUPERTORQUE™ lobular openings to grip the flat sides of 21 mm fasteners, significantly reducing the risk of rounding, even on stubborn, corroded, or high-torque hardware, and maximizing engagement.
• Precision 21 mm Metric Fit: Expertly machined for an exact and secure fit on common 21 mm fasteners found across a wide range of vehicle types and industrial equipment.
• Shallow Profile Design: Provides essential clearance for accessing fasteners in restricted areas, such as under hoods, near suspension components, or within compact machinery housings.
• Professional-Grade Durability: Constructed with a high-polished chrome finish and made in the USA, this tool is built to withstand rigorous daily use in professional shop environments, ensuring consistent performance and long service life in automotive repair, fleet maintenance, and industrial MRO tasks.

Applications

This 21 mm shallow socket is frequently employed by professional technicians for critical tasks such as accessing specific wheel lug nuts (on vehicles specifying 21 mm), various suspension fasteners, engine accessory components, and chassis brackets on a diverse range of cars, SUVs, and light-duty trucks. Within industrial and plant maintenance, it proves invaluable for assembly and service on machinery frames, structural supports, and equipment requiring 21 mm metric fasteners. Its shallow design is particularly advantageous when working around obstructions, crossmembers, or body panels that typically hinder the use of a deep socket. Please note, this socket is not suitable for impact use.

Specifications

• Drive size: 3/8"
• Socket size: 21 mm
• Point style: 6-point
• Style: Shallow
• Weight: 0.22 lb
• Manufacturer: J.H. Williams (A Snap-on Industrial Brand)
• Model number: JHWBM-621