Proto J78418MP Impact Socket 3/8 in Drive 18mm 6-point

Product Description

The PROTO J78418MP is a 6-point impact socket designed for heavy-duty fastener removal and installation in professional trade and industrial settings. Built from alloy steel, it accepts a 3/8 inch drive and fits 18mm hex fasteners. The overall length of 2-11/16 inches makes it suitable for standard access applications. This socket meets ASME B107.2 specifications, confirming dimensional and performance standards expected by working tradespeople. It is a direct-drive hex style socket intended for use with impact wrenches and air-driven tools common in mechanical, HVAC, and electrical service work.

This socket is used across a range of professional applications including HVAC equipment service, electrical panel work, plumbing fixture installation, and general mechanical assembly. The 3/8 inch drive size is well suited to mid-torque impact tools commonly found in service vans and shop environments. The 6-point contact geometry reduces fastener rounding under high torque, making it a reliable choice when working with stubborn or corroded hardware in residential and light commercial service scenarios.

Key Features

• 3/8 inch drive accepts standard 3/8 inch impact wrenches and ratchets
• 18mm 6-point hex socket profile reduces fastener rounding under impact torque
• Alloy steel construction rated for impact use
• Meets ASME B107.2 dimensional and performance standard
• Overall length of 2-11/16 inches fits standard access applications
• Universal style for broad compatibility across impact and hand-drive tools

Compatibility

Designed as an OEM-specification 3/8 inch drive impact socket compatible with standard 3/8 inch drive impact wrenches, air ratchets, and hand ratchets accepting 18mm hex fasteners.

Installation Notes

Installation and removal should be performed by a qualified technician familiar with impact tooling and fastener torque requirements. Always verify the drive tool is rated for impact use before attaching this socket. Ensure the fastener and socket are fully engaged before applying torque to prevent slippage or damage. Disconnect power or shut off relevant systems before performing any fastener service on energized or pressurized equipment.