The letters 'NC' in '1/4-20 NC' indicates...

Question 1 / 270705eccef9bbacbc34ba4d451dd

Question 1 of 270705eccef9bbacbc34ba4d451dd

The letters 'NC' in '1/4-20 NC' indicates the bolt is __________.

Question 1 of 27070

The letters 'NC' in '1/4-20 NC' indicates the bolt is __________.

🔍 Key Concepts

• Meaning of the size designation in a bolt callout like 1/4-20 NC • Difference between thread description (coarse/fine) and material or coating • Standard U.S. thread systems such as Unified National Coarse (UNC) and Unified National Fine (UNF)

💭 Think About

• Look at each part of the designation 1/4-20 NC: which part usually refers to diameter, which to threads per inch, and which to thread series? • Ask yourself: do bolt markings in this format normally specify what the bolt is made of or how the threads are cut? • Among the options, which one talks about the thread type rather than the metal or coating?

✅ Before You Answer

• Be sure you know that 1/4 typically refers to the nominal diameter in inches and 20 to threads per inch (TPI). • Confirm that the letters at the end of a bolt designation usually indicate the thread series (such as coarse vs fine), not the metal composition. • Eliminate any choices that describe material or surface coating, and focus on the one that describes a thread standard.

Question 1 of 27070

The letters 'NC' in '1/4-20 NC' indicates the bolt is __________.

threaded with national coarse threads

made of non-corrosive metal

made of nickel-cadmium metal

not clad with any coating