Proto J78415MP Impact Socket 3/8 in Drive 15mm

Product Description

The PROTO J78415MP is a 6-point impact socket designed for heavy-duty fastener work in professional trade environments. Built from alloy steel, it accepts a 3/8 inch drive and fits a 15mm hex fastener. The overall length is 2-11/16 inches, making it compact enough for tight-access applications. The 6-point design concentrates torque on the flat faces of the fastener, reducing rounding under high-impact loads. This socket is suited for automotive, HVAC equipment service, plumbing fixture work, and general mechanical assembly where impact-rated tooling is required.

This socket is used wherever a 3/8 inch drive impact wrench or ratchet is the tool of choice and a 15mm fastener is involved. Common applications include HVAC unit panel fasteners, pump mounting hardware, equipment access panels, and general mechanical maintenance. The universal style designation indicates broad applicability across service scenarios. It is intended for use by licensed trade professionals and experienced mechanics working in residential, commercial, and light industrial settings.

Key Features

• 6-point socket geometry reduces fastener rounding under impact loads
• Alloy steel construction rated for impact driver and impact wrench use
• 3/8 inch drive fits standard impact wrenches and ratchets
• 15mm hex drive size covers a wide range of metric fastener applications
• Compact 2-11/16 inch overall length suits confined installation spaces
• Meets ASME B107.2 specification for socket wrenches and attachments

Compatibility

Designed for use with any 3/8 inch drive impact wrench, air ratchet, or hand ratchet requiring a 15mm metric socket. Compatible with standard 3/8 inch square drive tooling across major tool platforms.

Installation Notes

Installation and removal of fasteners using this socket should be performed by qualified trade professionals familiar with impact tooling safety practices. Ensure the socket is fully seated on the fastener before applying torque to prevent slippage. Do not use impact sockets on hand-torque tools calibrated to specific torque values unless the socket is rated for that application. Inspect the socket for cracks or wear before each use and replace if damage is found.