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1/2 in Drive, Triple Square Metric Socket, 12 Points, Steel, Chrome, 21 mm MPN:J5421MN

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In Stock
Brand: Proto
Part #: J5421MN
UPC: 662679176198
SKU
510-G6562269
$72.87 for Order Qty of 3
Regular Price $34.01 Special Price $24.29

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1/2 in Drive, Triple Square Metric Socket, 12 Points, Steel, Chrome, 21 mm

This Proto 21mm triple square metric socket is designed for heavy-duty use in aerospace, automotive, and industrial applications. Its 12-point design provides extra grip on stubborn or damaged fasteners, while the TorquePlus design ensures maximum torque and durability. The socket's full polish finish meets and exceeds stringent aerospace specifications, providing a thicker nickel-chrome coating for enhanced corrosion-resistance and longevity. Ideal for use in tight spaces, this socket offers additional reach without compromising accessibility. Its compact size and robust construction make it an essential tool for professionals and DIY enthusiasts working with metric fasteners.

Top product features:

  • Full polish sockets meet and exceed stringent aerospace specification AS4984A which requires tools to have a thicker nickel-chrome coating for greater corrosion-resistance and durability
  • 12-Point sockets are ideal for use on stubborn or damaged fasteners
  • Features TorquePlus design

Top product applications:

  • General Aviation
  • Industrial Maintenance
  • Automotive Repair

Full polish sockets meet and exceed stringent aerospace specification AS4984A which requires tools to have a thicker nickel-chrome coating for greater corrosion-resistance and durability
12-Point sockets are ideal for use on stubborn or damaged fasteners
Intermediate lengths give additional reach without limiting accessibility in tight spaces

Additional Features:

  • - Features TorquePlus™ design


Additional Information

  • Country of Origin: US
  • Drop Ship Item: No
  • Blind Ship Eligible: No
  • LTL Freight Required: No
  • Lead Time: Ships in 1 days
  • Minimum Order Quantity: 1
  • Unit of Measure: EA
  • Package Length: 1.00
  • Package Width: 1.00
  • Package Height: 1.80
  • Package Weight: 0.20
Product info last updated on February 2, 2026 5:22pm UTC Category: Hand Tools
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In stock