Proto J5275AM 12mm 12-point Hand Socket 3/8 Drive

Product Description

The PROTO J5275AM is a 12mm, 12-point hand socket designed for use with a 3/8-inch drive ratchet or breaker bar. Built from alloy steel with a chrome-plated finish, it delivers corrosion resistance and a clean surface that is easy to wipe down in the field. At 1.75 inches in overall length, it is suited for standard fastener access in tight or open work spaces. The 12-point geometry allows engagement from more positions on a fastener head, which speeds workflow when clearance is limited. This socket meets ASME B107.5M standards for hand socket tools. Mechanics, maintenance technicians, and field service pros will find it a straightforward fit in any 3/8-inch drive socket set.

This socket is intended for general mechanical and industrial applications where a metric 12mm fastener requires a 3/8-inch drive hand tool. Common use cases include automotive service, equipment maintenance, HVAC unit assembly, and commercial facility maintenance. It is sold individually and is compatible with any standard 3/8-inch drive ratchet, extension, or breaker bar. The chrome finish holds up to shop environments and is compatible with standard tool-tray storage systems.

Key Features

• 12mm socket size with 12-point design for multi-angle fastener engagement
• 3/8-inch drive for compatibility with standard ratchets, extensions, and breaker bars
• Alloy steel construction for strength under torque
• Chrome-plated finish provides corrosion resistance and easy cleanup
• Meets ASME B107.5M standards for hand socket tools
• Compact 1.75-inch overall length for use in confined spaces

Compatibility

Designed for use with any standard 3/8-inch drive hand tool, including ratchets, breaker bars, and extensions. Fits 12mm 12-point fastener heads in automotive, industrial, and mechanical maintenance applications.

Installation Notes

This socket is installed by a mechanic or service technician using a 3/8-inch drive ratchet or breaker bar. Always confirm the fastener size before applying torque to avoid rounding. Do not use impact drivers with this hand socket unless it is rated for impact use. Store in a dry location to preserve the chrome finish.