K3720-1 - Lincoln Electric Stainless Steel Fillet Weld Gauge Set (7-Piece)

Precision Weld Inspection Instrument

The Lincoln Electric K3720-1 Weld Fillet Gauge Set is a critical instrument for quality control inspectors, welding supervisors, and fabrication professionals who require absolute precision in their work. Manufactured in the USA, this seven-piece set is engineered to verify that fillet welds meet specified design requirements and code tolerances. Proper weld sizing is essential for structural integrity; undersized welds may fail under load, while oversized welds result in wasted filler metal and potential distortion. This gauge set provides a quick, reliable method for checking weld dimensions against fabrication drawings, ensuring compliance with standards such as AWS D1.1.

Constructed from high-grade stainless steel, these gauges are designed to withstand the rigorous environments typical of industrial manufacturing. Unlike standard carbon steel gauges that are prone to rust and degradation, the stainless steel composition of the K3720-1 offers superior corrosion resistance. This ensures that the tool remains accurate and maintains its structural integrity over years of use. The set covers a comprehensive range of standard fillet sizes from 1/8 inch to 1 inch, making it versatile enough for a wide variety of applications, from light sheet metal fabrication to heavy structural steel work.

Visibility and legibility are paramount when performing inspections in varying lighting conditions. Lincoln Electric has addressed this by utilizing laser-etched size markings filled with black ink. This high-contrast design ensures that measurements can be read instantly without straining the eyes, significantly reducing the likelihood of inspection errors. Furthermore, the precision-cut edges are smoothed to prevent injury to the operator and to avoid scratching the base material during inspection. This attention to detail reflects Lincoln Electric's commitment to quality, accuracy, and user safety in professional industrial environments.

Whether utilized for in-process checks or final inspection, the K3720-1 set is a vital component of any professional welding toolkit. It allows for the measurement of both convex and concave fillet welds, providing a complete picture of the weld profile. By ensuring welds are within tolerance, fabricators can maintain high quality standards and avoid costly rework.