Proto, J5218SPL, Spline Socket, 3/8 in Drive, 9/16 in Size, Full Polish Chrome, Metal

Engineered for exceptional performance, the Proto spline socket is an essential tool for both professional and hobbyist mechanics. With a 3/8-inch drive and a 9/16-inch size, this full polish chrome socket features a unique spline design that minimizes foreign object debris, ensuring a precise fit that enhances torque delivery. It is particularly effective on high tensile strength fasteners, making it ideal for use in military and commercial aircraft as well as heavy machinery applications, where reliable torque is crucial amidst vibration. The socket’s innovative design allows it to handle high torque loads efficiently, reducing the risk of rounding edges on fasteners — even those with existing damage. This makes it a versatile addition to any toolbox aimed at achieving optimal performance in automotive and industrial settings.

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Features

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

• Drive Size: 3/8 in
• Size: 9/16 in
• Length: 1.2 in
• Width: 0.8 in
• Height: 0.8 in
• Weight: 0.1 lbs
• Material: Metal
• Finish: Full Polish Chrome
• Socket Type: Spline
• Spline Size: #18
• Unit Of Measure: SAE
• Country of Origin: United States