996105 - ESAB 996105 Contact Tip 3/64 for ST Torches (5-Pack)

Precision Engineering for Consistent Arc Stability

The ESAB 996105 Contact Tube is a critical consumable component designed to maintain the electrical integrity and mechanical precision of your MIG welding operations. Engineered specifically for use with 3/64-inch (approximately 1.2 mm) welding wires, this contact tube is manufactured to tight tolerances to ensure consistent current transfer from the power source to the filler metal. In industrial welding environments, the contact tube acts as the final point of electrical contact; therefore, the quality of its material and bore geometry directly influences arc stability, spatter generation, and overall weld bead morphology.

Constructed from high-grade copper alloy, the 996105 tube offers superior thermal conductivity and electrical efficiency. This material selection helps dissipate the intense heat generated at the arc zone, prolonging the service life of the consumable and preventing premature fusion of the wire to the tip—a common failure mode known as burn-back. The tube is designed to fit ESAB's legacy ST-series MIG guns, a line of torches renowned for their durability in heavy-duty fabrication. By utilizing genuine OEM parts, operators ensure that the gas flow dynamics and electrical connections within the torch head assembly remain within factory specifications.

This product is supplied in a pack of five, facilitating inventory management for high-volume production environments. Regular replacement of contact tubes is a standard maintenance procedure required to counteract the effects of mechanical wear (keyholing) caused by the friction of the feeding wire. When the bore becomes oval-shaped due to wear, electrical contact becomes intermittent, leading to micro-arcing inside the tip and unstable welding parameters. The ESAB 996105 provides a reliable solution for maintaining peak equipment performance when welding with 3/64" diameter wires, whether solid steel, aluminum, or flux-cored variants.

Integration with the ST series torch system is seamless, utilizing standard threading for quick changeovers during shift transitions or maintenance intervals. For fabrication shops prioritizing quality assurance and equipment longevity, adhering to manufacturer-specified consumables like the 996105 is essential for minimizing unplanned downtime and ensuring weld repeatability.