14K12 - ESAB 14K12 TIG Torch Back Cap O-Ring (5-Pack)

Precision Sealing for TIG Welding Torches

The ESAB 14K12 O-Ring is a critical maintenance component designed specifically for the back caps of standard TIG welding torches. Engineered with precise dimensions—an inner diameter of 0.145 inches and a cross-section thickness of 0.070 inches—this O-ring provides a reliable gas-tight seal between the back cap and the torch body. This seal is vital for the proper functioning of the torch, as it prevents the escape of shielding gas and blocks the ingress of atmospheric air that could contaminate the weld pool and cause porosity.

Compatible with the widely used 17, 18, and 26 series TIG torches, the 14K12 O-ring is manufactured from durable elastomeric material capable of withstanding the thermal cycling and environmental conditions typical of industrial welding operations. Over time, O-rings can suffer from compression set, drying, or cracking, which compromises shielding gas coverage. Regular inspection and replacement of these seals are recommended to maintain optimal torch performance and gas efficiency.

This product is supplied as a pack of five, providing welders and maintenance technicians with necessary spares to minimize downtime. Whether used in manual fabrication or automated setups, ensuring the integrity of the back cap seal is a fundamental step in achieving high-quality TIG welds. The ESAB 14K12 meets OEM specifications for fit and function, ensuring seamless integration with existing equipment.