PROTO, Industrial Tools

Phone: 800-800-TOOL

Proto® 3/8" Drive Impact Universal Joint

ITEM #:J77270P

Features and benefits

  • Tight tolerances for snug fit on fastener.
  • Used wherever powered drive tools are used to install or remove fasteners.
  • Designed to withstand the high torque and force associated with impact tools in repetitive application.
  • Features two through holes and a groove to accept a Proto® Retaining Ring or pin and O-ring to help secure the socket to the drive tool anvil.
  • Position at appropriate angle to turn fasteners where obstructions prevent a straight application.
  • Ball and spring design which allows for a 30° working angle.
  • Smooth 360° rotation.


Drive Size [in] 3/8
Finish Black Oxide
Length Type Standard
Unit of Measure Fractional
Drive end Outside Diameter [in] 15/16
Specification ASME ASME B107.110-2012
Overall Length [in] 2-1/32
Weight [Lbs] 0.21
Size [in] 3/8
Specification AS SAE AS4984A
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