Apex 84390 Impact Bit Socket 3/8 in Drive Hex 5 Mm

Product Description

The APEX 84390 is a standard-length impact bit socket designed for 3/8 inch drive tools, sized for 5 MM hex fasteners in metric applications. Built from chrome molybdenum alloy steel, this socket delivers the strength and fatigue resistance needed for repeated impact use in professional service environments. A manganese phosphate coating protects against corrosion on the job site or in storage. Off-corner loading geometry engages the fastener along its flats rather than its corners, reducing the chance of rounding damaged or overtightened fasteners. Laser-etched markings combined with a secondary hard stamping keep the size readable even after heavy use.

This socket suits residential, commercial, and industrial fastening tasks where a 3/8 inch drive impact wrench or impact driver with a square drive adapter is the tool of choice. It is sold individually, making it a practical replacement or single-size addition to an existing set. Electricians, HVAC technicians, plumbers, and general mechanical tradespeople working with metric hex fasteners will find it fits standard workflow without special tooling.

Key Features

• Chrome molybdenum alloy steel construction for high strength under impact loads
• Manganese phosphate coating resists corrosion and wear
• Off-corner loading reduces fastener rounding on worn or seized hardware
• Laser-etched markings with secondary hard stamping for long-term size identification
• 3/8 inch square drive compatible with standard impact wrenches and adapters
• Standard length at 2.36 inches suits the majority of accessible fastener locations

Compatibility

Designed as an OEM-style replacement or standalone addition for 3/8 inch drive impact tool sets requiring a 5 MM hex metric bit socket in standard length.

Installation Notes

Ensure the impact wrench or drive tool is fully depowered or disconnected from the air supply before changing sockets. Seat the socket fully onto the drive anvil and confirm the retaining detent or ring is engaged before applying torque. This socket is rated for impact use only — avoid using impact sockets on torque-sensitive fasteners without a calibrated torque wrench in the final step where specifications require it. Inspect the socket for cracks or deformation periodically and replace if damage is found.

Technical Specifications

• Drive Size: 3/8 inch
• Fastener Size: 5 MM hex
• Measurement Standard: Metric
• Socket Length: Standard (2.36 inches)
• Material: Chrome molybdenum alloy steel
• Coating: Manganese phosphate
• Weight: 0.14 pounds
• Sold As: Each

Standard Information

• Brand: APEX
• Manufacturer Part Number: 84390