0459990136 - ESAB 4.0x1.0mm Gas Euro-Connector O-Ring

Precision Sealing Component for MIG Systems

The ESAB O-Ring 4.0x1.0mm (Part Number: 0459990136) is a critical maintenance component designed for the gas connection interface of Euro-style central connectors. In MIG/MAG welding systems, the integrity of the shielding gas path is paramount to preventing atmospheric contamination of the weld pool. This O-ring is engineered with precise dimensions—4.0mm inner diameter and 1.0mm cross-section—to fit specific gas nipples within the Euro connector block.

Manufactured to ESAB's stringent quality standards, this sealing ring offers excellent resistance to the compression forces and environmental conditions typical of industrial welding environments. It serves as the primary barrier against gas leakage at the connection point between the welding gun and the wire feeder. A compromised O-ring in this location can lead to a drop in gas flow rate at the nozzle, resulting in porosity and compromised weld mechanical properties. This genuine replacement part ensures that the pneumatic circuit remains hermetically sealed, maintaining the set flow rates and pressure required for optimal arc stability.

Technicians and maintenance personnel should verify the dimensions of the existing seal against this 4.0mm x 1.0mm specification. It is commonly utilized in various ESAB MIG gun assemblies and machine-side Euro sockets. Regular inspection and replacement of this O-ring during routine maintenance intervals are recommended to ensure the longevity and performance of the welding equipment.