Types of Screw Heads and Washers English VersionFastener BasicsCommon Fastener TypesFastener Materials Hex bolts or hex cap screws are used in machinery and construction Can be used with a nut or in

material. Here are some common grades/classes:

• Grade 2 (Class 4.6): Low carbon steel, typically used in general hardware and construction.
• Grade 5 (Class 8.8): Medium carbon steel, heat treated for increased strength. Commonly used in automotive and machinery applications.
• Grade 8 (Class 10.9): High strength steel alloy, heat treated for maximum strength. Used in critical applications such as aerospace and military.
• Stainless steel: Corrosion-resistant, typically used in food processing, marine, and medical applications.
• Brass: Non-magnetic, corrosion-resistant, and decorative. Often used in electrical and plumbing applications.
• Nylon: Non-metallic, lightweight, and corrosion-resistant. Used in electrical and automotive applications.

It's important to choose the appropriate grade/class for your application to ensure proper strength and durability. Always refer to manufacturer specifications for guidance