Which item is used in low-temperature applications?

• A. Non Metallic
• B. Rivet
• C. Nuts
• D. Wing Nut

Answer: (A)

In low-temperature environments, how a material behaves when cooled is the key factor. Metals can lose ductility and become brittle as they chill, and their different thermal contraction can create stresses or cracks. Non-metallic materials, such as certain polymers or composites, are often chosen because they can retain toughness, stay flexible, or resist cracking at low temperatures, providing reliable performance where metals might fail.

That’s why non-metallic items are used in these applications: they avoid the brittleness and stress issues that metal fasteners and components can experience when exposed to very cold conditions. The other options—metal hardware like rivets and nuts—are more prone to brittleness or slippery changes under cold temps, making them less suitable in cryogenic or very low-temperature contexts.