Proto J47351S Socket Set 51 Piece 1/4 to 9/16 Inch

Product Description

The PROTO J47351S is a 51-piece socket set covering both SAE and metric fastener sizes. The set spans 1/4 inch through 9/16 inch SAE and up to 13.00 mm metric, all in 6-point configuration. Six-point sockets concentrate torque on the flat faces of a fastener rather than the corners, reducing the risk of rounding worn or damaged hardware. With a 1/4 inch drive, this set is suited for precision work in tight spaces — common in HVAC access panels, electrical enclosures, control boards, and plumbing fixture assemblies. Weighing 6 pounds, the complete kit is compact enough for a service van or tool bag.

This socket set is intended for professional tradespeople who need a compact 1/4 inch drive solution covering a wide range of common fastener sizes in a single kit. The dual SAE and metric coverage makes it practical across residential and light commercial service work where both measurement standards appear on the same equipment — a frequent reality on modern HVAC systems, water heaters, and electrical panels. Technicians working on equipment with closely spaced hardware or recessed fasteners will benefit from the 1/4 inch drive size and the range this set provides.

Key Features

• 51-piece set covers SAE (1/4 to 9/16 inch) and metric (up to 13.00 mm) fastener sizes
• 6-point socket geometry reduces fastener rounding on worn or corroded hardware
• 1/4 inch drive size suited for precision and tight-clearance applications
• Compact overall package dimensions of 16 x 11 x 2.61 inches for easy storage and transport
• Complete set weighs 6 pounds — portable for field service use

Compatibility

Designed as a general-purpose 1/4 inch drive socket set compatible with standard 1/4 inch drive ratchets, extensions, and adaptors used across HVAC, plumbing, electrical, and general mechanical service applications.

Installation Notes

Always select the correctly sized socket for the fastener to prevent slippage and hardware damage. Ensure the socket is fully seated on the drive before applying torque. When servicing energized equipment, follow applicable NEC or equipment manufacturer lockout/tagout procedures before using hand tools in electrical enclosures or control panels. Inspect sockets for cracks or wear before each use and replace damaged pieces promptly.