Proto J4990-10MXL Hex Bit Socket 3/8 in Drive 10 Mm

Product Description

The PROTO J4990-10MXL is a hand hex bit socket designed for 3/8 inch drive ratchets and drive tools. It accepts a 10 mm hex bit and delivers a 5-inch bit length, giving technicians extended reach in tight or recessed fastener applications. The overall length measures 6-29/32 inches. This socket is built for manual hand-tool use and is a standard piece in the service drives of HVAC, plumbing, and mechanical technicians who work with hex-head fasteners on equipment panels, access covers, and component mounting hardware.

This hex bit socket suits residential and commercial service work where 10 mm hex fasteners are encountered. Its 3/8 inch drive size makes it compatible with the most common mid-range drive ratchets and extensions used in field service. The extended bit length is particularly useful when fasteners are recessed into equipment housings or when a standard-depth socket cannot achieve adequate engagement depth.

Key Features

• 3/8 inch drive fits standard mid-range ratchets and drive tools
• 10 mm hex bit size for common metric hex fasteners
• 5-inch bit length provides extended reach in recessed or deep fastener locations
• 6-29/32 inch overall length for additional clearance in confined workspaces
• Hand tool rated for manual torque applications

Compatibility

Designed for use with 3/8 inch drive ratchets, extensions, and drive tools requiring a 10 mm hex bit socket.

Installation Notes

This socket is intended for hand-tool use with a 3/8 inch drive ratchet or breaker bar. Ensure the drive tang is fully seated before applying torque to prevent slippage or socket damage. Do not use with impact drivers unless the tool is rated for impact service. Follow applicable torque specifications for the fastener and application as defined by the equipment manufacturer.