Proto J5273A 3/8 Inch Drive 3/8 Inch 12-point Hand Socket

Product Description

The PROTO J5273A is a 3/8 inch, 12-point hand socket with a 3/8 inch drive, designed for professional-grade fastener work in mechanical, HVAC, plumbing, and electrical service applications. Built from alloy steel with a chrome-plated finish, this socket delivers corrosion resistance and durability in daily service use. The universal/flex socket type allows for off-axis access in tight or restricted spaces, making it a practical choice when straight-on fastener engagement is not possible. It meets ASME B107.1 standards, confirming dimensional and performance compliance for trade and industrial use. At 0.12 pounds, it is compact and lightweight without sacrificing the material strength required for reliable torque transfer.

This socket is suited for residential and commercial service environments where a 3/8 inch drive tool is the standard. The universal/flex design makes it especially useful in confined equipment bays, equipment panels, and mechanical spaces where technicians encounter angled or obstructed fasteners. HVAC technicians, pipefitters, electricians, and general mechanical service professionals will find this socket a useful addition to a 3/8 inch drive set. It is packaged individually and is compatible with any standard 3/8 inch drive ratchet, extension, or torque wrench.

Key Features

• 3/8 inch socket size with 3/8 inch drive for broad ratchet and extension compatibility
• 12-point design allows engagement at multiple fastener angles, reducing slip risk
• Universal/flex socket type enables off-axis fastener access in confined spaces
• Alloy steel construction provides strength and wear resistance under repeated use
• Chrome-plated finish resists corrosion and simplifies cleaning
• Meets ASME B107.1 standards for dimensional and performance compliance

Compatibility

Designed for use with any standard 3/8 inch drive ratchet, extension bar, or torque wrench. The universal/flex socket type is compatible with standard hex fasteners where offset or angled access is required.

Installation Notes

Installation and use of this socket does not require special certifications, but service technicians should always ensure the socket is fully seated on the fastener before applying torque to avoid rounding. Power down or de-energize equipment before accessing fasteners on electrical panels or HVAC components. Inspect the socket for cracks or wear prior to use, and do not use damaged sockets. Use with a calibrated torque wrench where fastener torque specifications are required by the equipment manufacturer or applicable service codes.