Proto 3/8" Drive Universal Socket 11/16" - 6 Point J5278HA-SBD

Proto's J5278HA-SBD is a high-performance 3/8-inch drive 11/16-inch 6-point SAE universal joint socket designed for industrial professionals who need to access fasteners at difficult angles. Featuring the advanced TorquePlus™ drive system, this specialty flex socket allows for a pivoting range of motion up to 65 degrees, providing the versatility of a universal joint with the precision and stability of a standard socket. It is forged from premium alloy steel and finished in full polish chrome to ensure maximum durability and corrosion resistance, meeting stringent aerospace standards for high-stakes mechanical environments.
Key Features
Universal Joint Design: Integrated flex joint permits turning at an angle up to 65 degrees where obstructions prevent a straight-line application.
TorquePlus™ Drive System: Advanced internal geometry grips the flats of the fastener rather than the corners to prevent rounding and increase torque transfer.
6-Point Hex Configuration: Provides maximum surface contact on 11/16-inch fasteners, ensuring a secure grip and reducing the risk of slippage on stubborn bolts.
Industrial Alloy Steel: Precision-forged and heat-treated for superior strength and a long service life under high-torque conditions.
Aerospace-Grade Finish: Full polish chrome finish meets AS4984A specifications, offering a thicker nickel-chrome coating for greater corrosion resistance.
Standard SAE Dimensions: Features an 11/16-inch opening size with an overall length of 1-31/32 inches, optimized for use with 3/8-inch drive tools.
Product Weight: Weighs approximately 0.15 lbs, providing a lightweight yet rugged solution for precision reach-in tasks.