3/8" Drive 12-Point Metric 21 mm Shallow Socket - J.H. Williams

The J.H. Williams JHWBM-1221 3/8" Drive 12-Point Metric 21 mm Shallow Socket is engineered for the rigorous demands of professional automotive and industrial environments. This socket's compact, shallow profile and precise 21 mm metric machining ensure reliable engagement on fasteners, particularly in confined spaces where standard sockets are impractical. It delivers consistent, professional-grade performance and improved access for technicians.

Key Features

• 3/8" Drive, 21 mm Metric: Designed for seamless compatibility with standard 3/8" drive ratchets and extensions, ideal for common 21 mm metric fasteners found on passenger cars, light trucks, and various fleet vehicles.
• 12-Point SUPERTORQUE® Design: Features SUPERTORQUE® lobular openings that provide greater turning power without deforming the fastener. This design allows for quick engagement on both 6 and 12-point fasteners and offers increased access angles, critical in restricted tool swing situations, while helping to minimize fastener rounding on worn or hard-to-reach hardware.
• Shallow Profile: The reduced overall length significantly improves access in tight locations such as around strut towers, control arms, engine accessory mounts, and brackets where deep sockets are impractical.
• Professional-Grade Construction: Built in the USA from alloy steel with a high-polished chrome finish, this socket is designed to withstand repeated high-torque applications with hand tools, featuring robust materials and geometry for exceptional durability in demanding shop conditions. Note: This socket is not suitable for impact use.

Applications

This 21 mm shallow socket is commonly utilized for lug-related hardware where a 3/8" drive is preferred, suspension brackets, engine accessory mounts, and general under-hood fasteners on both domestic and import vehicles. It is also an effective tool for maintenance routines involving industrial machinery, material handling equipment, and plant systems that incorporate 21 mm metric fasteners. Professional technicians, fleet mechanics, and industrial maintenance crews will find this socket invaluable for service work in cramped or obstructed areas.

Specifications

• Manufacturer: J.H. Williams
• Model Number: JHWBM-1221
• Drive Size: 3/8"
• Socket Type: 12-point
• Measurement System: Metric
• Size: 21 mm
• Profile: Shallow
• Weight: 0.18 lb
• Finish: High-Polished Chrome
• Country of Origin: USA