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3/8" & 1/2" PINLESS UNIV JOINT IMP ADAPT - Astro Pneumatic

Part #: AO78342

The Astro Pneumatic AO78342 Pinless Universal Joint Impact Adapters are engineered for professional technicians and mechanics seeking superior flexibility and durability in demanding automotive and industrial applications. This specialized two-piece set, featuring both 3/8" and 1/2" drive universal joint adapters, provides enhanced access to fasteners in confined or obstructed areas, ensuring efficient and uninterrupted power transfer from your impact tools.

Key Features

  • Pinless Universal Joint Design: Engineered without a traditional pin, these adapters offer enhanced durability, smoother operation, and continuous power transfer for reliable performance under high torque conditions. They allow for improved angular access, up to 30 degrees, enabling work on fasteners in previously inaccessible locations.
  • Impact-Grade Construction: Manufactured from high-strength Chrome Molybdenum (Cr-Mo) steel, these adapters are built to withstand the rigorous demands of impact wrenches and drivers, ensuring a long service life in professional environments.
  • Dual Drive Sizes: The set includes both 3/8" and 1/2" drive universal joint adapters, providing essential versatility to tackle a wide range of fasteners and ensuring compatibility with various impact tools and sockets.
  • Corrosion-Resistant Finish: A black oxide coating helps prevent rust and corrosion, extending the lifespan of the adapters in challenging shop and industrial conditions.
  • Lifetime Warranty: Backed by a lifetime warranty, these adapters assure long-term reliability and peace of mind for professional users.

Applications

These pinless universal joint impact adapters are indispensable for a wide array of professional tasks. Automotive technicians will find them invaluable for accessing bolts and nuts in cramped engine bays, undercarriages, suspension systems, and exhaust manifolds where straight extensions are insufficient. Industrial maintenance personnel can utilize them for assembling and disassembling machinery in complex setups or where conventional sockets cannot reach. They are also suitable for construction workers needing to fasten in awkward angles or obstructed areas, making tasks more efficient and less strenuous.

Specifications

  • Model Number: 78342
  • Drive Sizes: 3/8" and 1/2"
  • Material: Chrome Molybdenum Steel (Cr-Mo)
  • Finish: Black Oxide
  • Total Weight: Approximately 10.2 ounces
  • Dimensions (LxWxH): 5.51 x 3.94 x 1.24 inches
Only 1 left in stock - order soon

$18.24

Free shipping on orders over $250
Lower 48 states and DC. Excludes freight and oversize items.
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This product was added to our catalog on Friday 10 July, 2026.

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