Proto J4990-6M 3/8 in Drive 6 mm Hex Bit Socket

The Proto J4990-6M is a 3/8 in drive, 6 mm hex bit socket for driving hex socket fasteners with a ratchet or drive handle of the matching drive size.

The manufacturer states it is made from a heat-treated alloy for wear resistance, which helps limit distortion over a long life, and that the hex opening holds the bit so the bit holder takes the torque load. Sold as a single socket.

Features

• 3/8 in drive, 6 mm hex bit socket
• Heat-treated alloy for wear resistance, per the manufacturer
• Helps minimize distortion over a long life, per the manufacturer
• Hex opening holds the bit so the holder takes the torque load

Specifications

Part numbers

Documents

• Manufacturer data sheet