Proto J4770-3M Hand Hex Bit Socket 1/4 in Drive 3 Mm

Product Description

The PROTO J4770-3M is a hand hex bit socket designed for manual drive applications requiring precise hex fastener engagement. It accepts a 1/4 inch drive and fits a 3 mm hex bit profile. The overall length measures 1-7/8 inches with a usable bit length of 1 inch. This socket is intended for use with manual ratchets, T-handles, or breaker bars in bench work, assembly, and service applications. Trades including mechanical, electrical, and HVAC service technicians rely on hand hex bit sockets for fastener access in confined or torque-sensitive locations where power tools are not appropriate.

The PROTO J4770-3M suits residential and commercial service environments where small hex fasteners are common. Typical applications include equipment panel fasteners, set screws, and recessed hex bolts found in HVAC equipment, electrical enclosures, and plumbing fixtures. The 3 mm hex size and compact 1-7/8 inch overall length make it well suited for tight access situations. This socket is sold individually and is appropriate for both field service and shop use.

Key Features

• 1/4 inch drive compatible with standard manual ratchets and T-handles
• 3 mm hex bit profile for precise fastener engagement
• 1 inch bit length for effective reach into recessed fasteners
• Compact 1-7/8 inch overall length for use in confined spaces
• Sold as a single unit with no minimum order beyond one piece

Compatibility

Designed as a standard 1/4 inch drive hand hex bit socket suitable for use with compatible manual drive tools accepting hex bit sockets in the 3 mm hex size.

Installation Notes

This socket is for manual drive use only and should be paired with a properly rated 1/4 inch drive ratchet or handle. Always confirm the hex size matches the fastener before applying torque to avoid rounding the fastener head. De-energize equipment and relieve system pressure before accessing fasteners in electrical, HVAC, or plumbing systems. Follow applicable trade codes and manufacturer service procedures when removing or installing hardware in live systems.