PROTO, Industrial Tools

Phone: 800-800-TOOL

Proto® 1" Drive Sockets - Spline

Features and benefits

  • Proto® Spline tools are designed to service high tensile strength fasteners used widely on military and commercial aircraft and in heavy machinery applications where vibration is prevalent. They are also used in automotive and industrial areas where high performance torque needs to be achieved.
  • Spline sockets help tighten high-strength bolts to high torque loads. They help lower the force required to turn standard fasteners by allowing the torque load to be moved away from the corners to help prevent fastener rounding. They also turn fasteners with damaged corners.
  • Spline sockets on spline fasteners help deliver twice the torque of 12 point wrenches on double-box fasteners, and more torque than hex wrenches on hex fasteners.
  • Spline helps reduce foreign object debris (FOD) by having a precise fit between the fastening tool and its fastener.


Drive Size [in] 1
Point Size Spline
Finish Full Polish
Length Type Standard
Unit of Measure Fractional
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ITEM #: Size [in] Nut End Outside Diameter [in] Drive end Outside Diameter [in] Nut Depth [in] Bolt Clearance Depth [in] Overall Length [in] Weight [Lbs]
J5732SPL 1 1-1/2 1-7/8 7/8 1-1/4 2-7/16 0.82 Add to Wish list Add to Set
J5734SPL 1-1/16 1-1/2 1-7/8 7/8 1-1/4 2-1/2 0.91 Add to Wish list Add to Set
J5736SPL Add to Wish list Add to Set
J5738SPL 1-3/16 1-11/16 2 1-3/16 1-5/8 2-3/4 1.09 Add to Wish list Add to Set
J5740SPL 1-1/4 1-11/15 2 1-3/16 1-5/8 2-3/4 1.18 Add to Wish list Add to Set
J5742SPL 1-5/16 1-7/8 2 1-3/16 1-3/4 2-7/8 1.27 Add to Wish list Add to Set
J5744SPL Add to Wish list Add to Set
J5746SPL 1-7/16 2 2 1-1/4 1-15/16 3 1.46 Add to Wish list Add to Set
J5748SPL 1-1/2 2-1/8 2-1/8 1-5/16 2 3 1.55 Add to Wish list Add to Set