Eye nuts must be affixed to SAE Grade 5 / ASTM A449 threaded material.

Eye nuts must be affixed to SAE Grade 5 / ASTM A449 threaded material.

• A. False
• B. Not required
• C. Eye nuts must be affixed to SAE Grade 5 / ASTM A449 threaded material
• D. True

Answer: (C)

The key idea is that the strength of the eye nut’s threaded connection is determined by the material it’s threaded into. Eye nuts are designed to transfer lift forces through their threads, so the mounting material must provide enough shear and tensile strength to carry the load. SAE Grade 5 and ASTM A449 specify a high-strength threaded material that matches the eye nut’s rated capacity. Using that exact grade ensures the thread engagement can safely handle the forces applied during lifting or pulling. If a weaker material or a different standard is used, the threads could yield or strip, leading to failure. That’s why the correct statement is that eye nuts must be affixed to SAE Grade 5 / ASTM A449 threaded material. The other options are not correct because they don’t convey the necessary material-strength requirement, or they’re too vague.

The key idea is that the strength of the eye nut’s threaded connection is determined by the material it’s threaded into. Eye nuts are designed to transfer lift forces through their threads, so the mounting material must provide enough shear and tensile strength to carry the load. SAE Grade 5 and ASTM A449 specify a high-strength threaded material that matches the eye nut’s rated capacity. Using that exact grade ensures the thread engagement can safely handle the forces applied during lifting or pulling. If a weaker material or a different standard is used, the threads could yield or strip, leading to failure.

That’s why the correct statement is that eye nuts must be affixed to SAE Grade 5 / ASTM A449 threaded material. The other options are not correct because they don’t convey the necessary material-strength requirement, or they’re too vague.