What reading would ¼ -20 SAE Grade 8 represent?

What reading would ¼ -20 SAE Grade 8 represent?

• A. 1/4 size, 20 threads per inch, Society of Automotive Engineering, 6 lines of head of bolt
• B. 1 size, 24 threads per inch, Society of Automotive Engineering, 8 lines of head of bolt
• C. 1/4 size, 20 threads per inch, American National Standards Institute, 6 lines of head of bolt
• D. 1/2 size, 20 threads per inch, Society of Automotive Engineering, 4 lines of head of bolt

Answer: (A)

The correct reading of ¼ -20 SAE Grade 8 is accurately described as 1/4 size, 20 threads per inch, Society of Automotive Engineering, with 6 lines on the head of the bolt. This designation breaks down as follows: - The "¼" indicates the nominal diameter of the bolt in inches, which in this case is 1/4 inch. - The "-20" specifies the thread count, meaning there are 20 threads per inch (TPI). This is a common thread size for bolts in various applications. - The term "SAE" stands for the Society of Automotive Engineers, which sets standards for many mechanical components, including dimensions and performance specifications for threaded fasteners. - The reference to 6 lines on the head of the bolt is a characteristic of Grade 8 bolts, which are identified by a specific number of radial lines on the head. Grade 8 bolts are often marked with 6 lines to signify their high tensile strength and performance features. The other options present incorrect thread sizes, thread counts, or classifications which do not accurately reflect the specifications of a ¼ -20 SAE Grade 8 bolt.

The correct reading of ¼ -20 SAE Grade 8 is accurately described as 1/4 size, 20 threads per inch, Society of Automotive Engineering, with 6 lines on the head of the bolt.

This designation breaks down as follows:

• The "¼" indicates the nominal diameter of the bolt in inches, which in this case is 1/4 inch.

• The "-20" specifies the thread count, meaning there are 20 threads per inch (TPI). This is a common thread size for bolts in various applications.

• The term "SAE" stands for the Society of Automotive Engineers, which sets standards for many mechanical components, including dimensions and performance specifications for threaded fasteners.

• The reference to 6 lines on the head of the bolt is a characteristic of Grade 8 bolts, which are identified by a specific number of radial lines on the head. Grade 8 bolts are often marked with 6 lines to signify their high tensile strength and performance features.

The other options present incorrect thread sizes, thread counts, or classifications which do not accurately reflect the specifications of a ¼ -20 SAE Grade 8 bolt.