Eye nuts must be attached to a threaded member of which specification?

Eye nuts must be attached to a threaded member of which specification?

• A. SAE Grade 8
• B. ASTM A36
• C. SAE Grade 5 / ASTM A449
• D. Stainless steel

Answer: (C)

Eye nuts are only as strong as the threaded member they’re attached to, so the fastener must meet a defined strength specification to avoid the threads becoming the weak link under load. The correct requirement is SAE Grade 5 or ASTM A449, which guarantees the threaded connection has enough tensile strength to safely carry the eye nut’s rated load. Using a weaker option like carbon steel A36 would introduce a weaker path in the connection and could fail first. Stainless steel is a different material classification and does not specify the needed strength grade. While SAE Grade 8 is stronger than Grade 5, the standard expectation for eye nuts is the Grade 5 / A449 specification, making it the best answer.

Eye nuts are only as strong as the threaded member they’re attached to, so the fastener must meet a defined strength specification to avoid the threads becoming the weak link under load. The correct requirement is SAE Grade 5 or ASTM A449, which guarantees the threaded connection has enough tensile strength to safely carry the eye nut’s rated load. Using a weaker option like carbon steel A36 would introduce a weaker path in the connection and could fail first. Stainless steel is a different material classification and does not specify the needed strength grade. While SAE Grade 8 is stronger than Grade 5, the standard expectation for eye nuts is the Grade 5 / A449 specification, making it the best answer.