Application Profile

Plug Electrode

Nickel alloy terminal flat/pierced undercut-thermocouple plug electrode
Plug Electrode 3D Rendering Plug Electrode Technical Drawing
Use:  One of two electrode pins used in thermocouple applications.
Material:  Nickel alloy (95% Ni,2% Mn,2%Al,1%Si) (often referred to as alumel) for thermocouple applications.
Manufacturing Method: 
  • Formed/coined/trimmed/pierced on automatic forming machinery. Rolled undercut is a secondary process.



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Notable Features: 
  • Coined flat (ie: flattened and pierced and trimmed area) is very thin relative to the wire OD (approx. .200" (5.1mm).
  • The rolled undercut is a retention feature.
  • Surface finishes are better than machining.
  • This solid pin has better electrical and thermal characteristics than a hollow pin made from sheet metal.
  • Cost. Forming with a secondary rolled undercut is vastly less expensive than using a machining process. Production speeds are high for this high volume piece allowing for low production costs.

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