Proto J49901/8ST Hand Hex Bit Socket 3/8 in Drive

Product Description

The PROTO J49901/8ST is a hand hex bit socket designed for manual fastening and driving applications requiring precise hex bit engagement. Built for 3/8 inch drive tools, this socket accepts a 1/8 inch hex bit and delivers reliable torque transfer in tight or controlled-access fastening tasks. With an overall length of 1-13/16 inches and a bit length of 3/4 inches, it fits standard 3/8 inch drive ratchets, torque wrenches, and extensions. Electricians, HVAC technicians, plumbers, and mechanical contractors reach for hex bit sockets when working with set screws, fasteners on equipment panels, and hardware that demands hex drive engagement.

This hex bit socket suits residential and commercial service work where 1/8 inch hex fasteners appear on equipment covers, motor components, valve assemblies, and electrical enclosures. The 3/8 inch drive size is a common mid-range drive standard found throughout professional tool kits. It is well suited for bench work, field service calls, and installations where a standard ratchet or torque wrench is the primary drive tool. The compact bit length makes it practical in moderately confined spaces without requiring a full extension.

Key Features

• 3/8 inch drive interface compatible with standard ratchets, torque wrenches, and extensions
• 1/8 inch hex bit size for driving small hex fasteners and set screws
• Overall length of 1-13/16 inches for controlled reach in typical service tasks
• 3/4 inch bit length provides solid hex engagement on fasteners
• Hand socket format for manual drive applications requiring feel and control

Compatibility

Designed for use with standard 3/8 inch drive hand tools including ratchets, torque wrenches, and drive extensions. Fits 1/8 inch hex fasteners and set screws as typically found across HVAC, electrical, plumbing, and mechanical equipment.

Installation Notes

Install and remove using a 3/8 inch drive ratchet or torque wrench only — do not use impact drivers with hand-rated sockets unless the socket is impact-rated. Ensure the hex bit is fully seated in the fastener recess before applying torque to avoid rounding. De-energize or shut off equipment before accessing fasteners on electrical panels or mechanical assemblies. Follow applicable torque specifications for the fastener and equipment being serviced.