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Angled view of a long 6-point deep socket showing internal hex profile, knurled grip ring and embossed marking near the baseSocket viewed from the drive end showing square 3/8" female drive, knurled band and an embossed marking on the bodyTop view into a long 6-point deep socket showing six internal faces, cylindrical exterior, knurled ring and embossed marking near the base

3/8-Inch Drive 6-Point Long Hand Socket, 21mm

Professional-grade 21mm deep socket with 6-point drive for precision fastening and reduced cam-out in automotive work.

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Description

3/8-Inch Drive 6-Point Long Hand Socket, 21mm

Brief Overview

This 21mm 6-point long hand socket delivers the precision and durability your shop needs for consistent, reliable fastening operations. The extended length reaches recessed fasteners that standard sockets cannot access, while the 6-point design grips hex fasteners securely without the rounding risk associated with 12-point tools. Whether you're stocking individual sizes or building a complete 3/8-inch socket range, this socket is a foundational tool for any professional mechanic's toolkit.

Key Features

  • 6-Point Drive Design: Provides superior grip on hex fasteners, minimizing cam-out and fastener damage during removal and installation
  • Extended Length: 63mm overall length reaches deep cavities and recessed fasteners inaccessible to standard sockets
  • 3/8-Inch Drive: Compatible with all standard 3/8" drive ratchets, extensions, and impact tools
  • Knurled Grip Ring: Non-slip texture for secure hand handling and quick socket identification during rapid tool changes
  • Chrome-Plated Finish: Durable, corrosion-resistant surface that maintains appearance under heavy shop use
  • Precision Machining: Tight dimensional tolerances ensure consistent fit and reduced wobble on fasteners

Business Advantages for Resellers

  • High-Velocity SKU: Individual socket sizes allow resellers to stock popular fastener sizes without excess inventory
  • Complementary to Ratchet Sales: Drives repeat orders when paired with 3/8" drive ratchets and tool sets
  • Professional Grade Margin: Quality construction justifies premium positioning over budget alternatives
  • Bulk Order Flexibility: Offer single units for replacements or bundled sets for shop outfitting programs

Technical Specifications

Specification Value
Drive Size 3/8 inch (square female recess)
Socket Type 6-Point Deep/Long
Fastener Size 21mm
Overall Length 63mm
Head Diameter (d1) 28.0mm
Head Width (d2) 25.0mm
Wall Thickness 18mm
Material Chrome-Plated Steel
Finish Chrome
Drive Profile Hex (6-point)

Why This Socket Works

The 6-point geometry is engineered to distribute load across the fastener's flat faces rather than corners, dramatically reducing the risk of rounding and stripping—a critical advantage when working with damaged or seized fasteners. The extended 63mm length makes it indispensable for accessing fasteners in tight engine compartments, suspension assemblies, and other recessed locations where standard sockets fall short.

The knurled grip ring isn't cosmetic; it provides tactile feedback during rapid socket swaps, reducing fumbling time and improving shop efficiency. The chrome plating resists corrosion and rust, ensuring the socket remains serviceable through years of daily use in damp shop environments.

Recommended Pairings

  • 3/8" drive ratchets (mechanical or impact-rated)
  • 3/8" drive extensions for reaching deeper cavities
  • Other sizes in the 8-24mm socket range to complete mechanic kits
  • Socket organizers and storage systems for professional presentation

Call to Value

Stock this 21mm socket individually for replacement sales, or bundle it with other 6-point long hand sockets in standard sizes to create a complete, profitable line. The precision design and professional finish position this as a must-have tool for shops serious about reducing fastener damage and improving first-time removal success.