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K224 - Replacement O-Ring for Tweco Style MIG Gun Power Pin

Packaging: 1 of each
$1.00/ea $0.83/1 of each only $0.83/eaSave 17%

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OVERVIEW

Reliable Gas Sealing for Industrial MIG Systems

The K224 O-ring is a critical replacement component designed for Tweco-style MIG gun power pins. In high-volume industrial welding environments, the integrity of the shielding gas delivery system is paramount to maintaining weld quality and reducing operational costs. This O-ring serves as the primary seal between the MIG gun's back end (power pin) and the wire feeder's receptacle. Over time, repeated connection and disconnection, along with exposure to heat and workshop contaminants, can degrade the elastomer, leading to compromised sealing.

Manufactured from high-grade synthetic rubber, this O-ring offers excellent resistance to hardening, cracking, and deformation. It is engineered to withstand the specific rigors of the welding environment, including exposure to residual lubricants and ozone. By ensuring a tight fit, the K224 prevents shielding gas from escaping at the connection point, which not only conserves expensive gas consumables but also prevents the aspiration of atmospheric air into the gas stream—a common cause of weld porosity and oxidation.

For facility managers and maintenance teams, keeping a stock of K224 O-rings is a standard best practice for preventive maintenance. These small components are often the single point of failure in a gas delivery system that can halt production or lead to rework. This replacement part is dimensionally accurate to the original manufacturer specifications, ensuring seamless compatibility with a wide range of Tweco-style guns and back-end configurations. Whether for routine service intervals or emergency repairs, this O-ring provides a cost-effective solution to maintain equipment performance and weld standards.

Key Technical Benefits:

  • Dimensional Accuracy: Precision molded to fit standard Tweco power pin grooves without binding or tearing.
  • Material Durability: Resistant to compression set, ensuring the seal remains effective over multiple connection cycles.
  • Cost Efficiency: Prevents gas leaks that can silently drain cylinder supplies and increase overhead.
Additional Information
Item:O-Ring
Brand:Tweco Style
Product Type:Replacement Part
Compatible Brand/Model:Tweco
Material:Rubber/Elastomer
Applications:MIG Welding, Torch Repair
Packaging Description:1 of each

INCLUDED

  • 1 x K224 Replacement O-Ring

APPLICATIONS

  • MIG Welding (GMAW)
  • Flux-Cored Welding (FCAW-G)
  • Torch Maintenance and Repair
  • Industrial Fabrication
  • Automotive Body Repair

FAQ

It is used to create a gas-tight seal on the power pin (back end) of a Tweco-style MIG gun where it connects to the wire feeder.

Signs include a hissing sound at the feeder connection, unexplained gas loss, or porosity in your welds. Visually, the O-ring may look flat, cracked, or missing.

No, it is specifically designed for Tweco-style power pins. It will not fit Miller, Lincoln, or Euro-style back ends unless they are converted to Tweco style.

Usually, no. You can often remove the old one and roll the new one on with your fingers. A small pick might help remove the old one if it is stuck.

It is typically made from a synthetic rubber or elastomer designed to resist oil, ozone, and the compression forces of the welding connection.

No, this O-ring is for the back end of the gun (the power pin). The nozzle insulator or gas diffuser uses different O-rings.

While durable, rubber components should be stored away from direct sunlight and extreme heat to prevent premature dry rot before use.

A very light amount of silicone lubricant or O-ring lube can help it slide into the feeder easier and prevent tearing, but avoid petroleum-based greases if possible.