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3/8 Inch Drive Half Size Nano Socket Set for Undersized Swol - Astro Pneumatic

Part #: 78312

The Astro Pneumatic 78312 3/8 Inch Drive Half Size Nano Socket Set is engineered for professional technicians and mechanics who frequently encounter challenging fasteners. This specialized 11-piece set offers crucial 0.5mm increments, providing precise fitment for undersized, swollen, or damaged bolts and nuts where standard sockets often fail. Its compact, low-profile design ensures access in confined engine bays and other tight working areas.

Key Features

  • Precision Half Sizes: Includes 9.5mm, 10.5mm, 11.5mm, 12.5mm, 13.5mm, 14.5mm, 15.5mm, 16.5mm, 17.5mm, 18.5mm, and 19.5mm sockets to address fasteners that are slightly off standard metric sizes due to wear or corrosion.
  • Durable Chromoly Construction: Forged from robust Chromoly (CR-MO) steel, these impact-grade sockets are built for exceptional strength and longevity under demanding professional use.
  • Low-Profile Design: At 1.10 inches (28mm) long, these nano sockets are significantly shorter than standard shallow impact sockets, enabling access in extremely restricted spaces.
  • External Hex for Wrench Access: Each socket features an outside hex, such as a 17mm hex, allowing technicians to use an open-end or ratcheting wrench for additional leverage or when a ratchet cannot fit.
  • Organized Storage: The set comes complete with a durable aluminum socket holder for convenient organization and quick identification of sizes.

Applications

This Astro Pneumatic Nano Socket Set is an indispensable tool for automotive repair, industrial maintenance, and other applications where precision and access are critical. It is particularly effective for removing rounded or corroded bolts by providing a tighter grip (using a 0.5mm undersized socket) or for accommodating swollen or cap-covered nuts (using a 0.5mm oversized socket). The ability to address imperfect fasteners reduces downtime and the need for more aggressive removal methods, making it invaluable for tasks in tight quarters such as engine components, undercarriage work, and various machinery repairs.

Usually In Stock Usually ships in 24-48 hours Manufacturer Direct
List: $64.83 Save: $23.16

$41.67

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  • Model: 467609
  • Shipping Weight: 1lbs
  • UPC: 745227092758
  • Manufacturers Part #: 78312
  • Manufactured by: Astro Pneumatic
  • Also Known As: AST78312, AST-78312

This product was added to our catalog on Wednesday 17 June, 2026.

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