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Socket 3/8" Drive Metric Semi-Deep 12 pt 21 - NEPROS

Part #: B3M-21W

The NEPROS B3M-21W 3/8" Drive Metric Semi-Deep 12 pt 21 Socket is engineered for precision and reliability in demanding professional environments. This 21mm 12-point socket provides a secure grip on fasteners, minimizing the risk of rounding and ensuring efficient operation in various automotive and industrial applications. Crafted with NEPROS's commitment to quality, it offers technicians and mechanics a durable and dependable tool for everyday tasks.

Key Features

  • Precision 21mm Metric Size: Accurately sized for a wide range of metric fasteners commonly found in vehicles and machinery.
  • 12-Point Design: Provides multiple contact points with the fastener, facilitating easier engagement and reducing the chance of slippage or fastener damage, especially in tight or obstructed areas.
  • Semi-Deep Profile: Offers a versatile balance between standard and deep sockets, providing sufficient reach for many recessed fasteners while maintaining a compact profile for confined spaces.
  • 3/8" Square Drive: Compatible with a broad selection of 3/8" drive ratchets, extension bars, and other drive tools, enhancing its utility across different tasks.
  • Professional-Grade Construction: Manufactured by NEPROS, this socket is built from high-grade materials to withstand the rigors of daily professional use, ensuring longevity and consistent performance.

Applications

The NEPROS B3M-21W socket is an essential addition for professional technicians working on automotive repairs, including engine components, suspension systems, and chassis work where 21mm metric fasteners are present. Its semi-deep design is particularly beneficial for accessing bolts with moderate shaft lengths or when requiring slightly more clearance than a standard socket. Beyond automotive uses, it is well-suited for industrial machinery maintenance, equipment assembly, and general mechanical repair tasks that demand a precise and robust 21mm 12-point socket.

Only 1 left in stock - order soon

$15.54

Free shipping on orders over $250
Lower 48 states and DC. Excludes freight and oversize items.
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  • Model: 442379
  • Shipping Weight: 0.31lbs
  • UPC: 00498943130637
  • Manufacturers Part #: B3M-21W
  • Manufactured by: NEPROS
  • Also Known As: KTC-B3M-21W

This product was added to our catalog on Saturday 30 May, 2026.

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