3/8 in. Drive 3/8 in. #12 Socket

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

Additional Features

Spline helps reduce foreign object debris (FOD) by having a precise fit between the fastening tool and its fastener

SKU	Product Name	Nut End Outside Diameter [Imperial]	Drive End Outside Diameter [Imperial]	Nut Depth [Imperial]	Bolt Clearance Depth [Imperial]	Overall Length [Imperial]	Product Weight [Imperial]
J5212SPL	3/8 in. Drive 3/8 in. #12 Socket	9/16 in	21/32 in	385 in	11/16 in	1 in	0.06 lbs
J5214SPL	3/8 in. Drive 7/16 in. #14 Spline Socket	5/8 in	11/16 in	7/16 in	3/4 in	1-1/16 in	0.06 lbs
J5216SPL	3/8 in. Drive 1/2 in. #16 Spline Socket	3/4 in	23/32 in	7/16 in	3/4 in	1-1/16 in	0.07 lbs
J5220SPL	3/8 in. Drive 5/8 in. #20 Spline Socket	7/8 in	7/8 in	17/32 in	7/8 in	1-3/16 in	0.13 lbs
J5218SPL	3/8 in. Drive 9/16 in. #18 Spline Socket	13/16 in	13/16 in	15/32 in	3/4 in	1-1/16 in	0.01 lbs

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We take extensive measures to ensure all our products are made to the very highest standards and meet all relevant industry regulations.