Proto J78416MP Impact Socket 3/8 Drive 16mm 6-point

Product Description

The PROTO J78416MP is a 16mm, 6-point impact socket designed for 3/8 inch square drive impact wrenches and ratchets. Built from alloy steel, it delivers the wall strength and toughness required to handle high-torque impact use without cracking or rounding fasteners. The 6-point hex drive geometry contacts flat sides of the fastener rather than corners, reducing the chance of fastener damage under load. At 2-11/16 inches overall length, this socket fits within standard reach requirements for most automotive and mechanical applications. It meets ASME B107.2 specifications, confirming dimensional and performance conformance.

This socket is suited for automotive service, fleet maintenance, industrial assembly, and general mechanical repair where 16mm fasteners are common. The 3/8 inch drive size makes it compatible with mid-range impact wrenches and hand ratchets, offering a balance of torque capacity and accessibility in tighter spaces. Licensed mechanics, fleet technicians, and industrial maintenance workers regularly rely on 3/8 inch drive impact sockets for suspension, drivetrain, and engine work.

Key Features

• 6-point hex drive contacts fastener flats, reducing fastener rounding under impact torque
• Alloy steel construction provides impact-rated wall strength and durability
• Meets ASME B107.2 dimensional and performance specification
• 3/8 inch square drive fits a wide range of impact wrenches and hand ratchets
• 2-11/16 inch overall length suits most standard-reach applications

Compatibility

Designed as an OEM-style impact socket for use with 3/8 inch drive impact wrenches, air ratchets, and hand ratchets requiring a 16mm, 6-point socket.

Installation Notes

Impact sockets are installed by automotive technicians and mechanical trades. Always use impact-rated sockets with pneumatic or electric impact wrenches — chrome hand-tool sockets are not rated for impact use and can shatter. Confirm the socket is fully seated on the drive anvil before applying torque. Inspect for cracks or deformation before each use and remove from service if any damage is found.