1.3981 Stainless Precision Tube 4.5x0.2

This high quality 1.3981 Stainless Precision Tube 4.5x0.2, comes in outer diameter of 4.5, wall thickness 0.2, and inner diameter 4.1.

1.3981 / Nilo K Nilo K, also known as Kovar, is an iron-nickel-cobalt alloy with a coefficient of thermal expansion similar to that of hard glass.Here are some key points about Nilo K:
Nilo K has a low coefficient of thermal expansion, which makes it suitable for applications where a tight seal is required between different materials with different expansion rates, such as in electronic devices and glass-to-metal seals.
It has a nominal composition of 29% Nickel, 17% Cobalt, and the remaining balance Iron, along with small amounts of other elements.
Nilo K exhibits excellent dimensional stability over a wide temperature range, making it ideal for applications that require precise tolerances.
It is commonly used in the electronics industry for applications such as hermetic sealing, lead frames, and glass-to-metal seals in electronic devices.
Nilo K can be machined, welded, and brazed using standard techniques. The alloy is available in various forms, including sheet, plate, rod, wire, and tube.