What class of screw thread is indicated with...

Question 1 / 270705eccef9bbacbc34ba4d451d0

Question 1 of 270705eccef9bbacbc34ba4d451d0

What class of screw thread is indicated with a machine screw described as 1/2-13 NC-2?

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Question 1 of 27070

Q

What class of screw thread is indicated with a machine screw described as 1/2-13 NC-2?

🔍 Key Concepts

• How machine screw sizes are written (diameter – threads per inch – series – class) • Difference between diameter, threads per inch (TPI), thread series (NC/UNF), and thread class (fit) • Location of the thread class number in a standard screw designation

💭 Think About

• Break down what each part of 1/2-13 NC-2 represents. Which part shows the size? Which shows how tight/loose the fit is? • Ask yourself: which part (number or letters) usually tells you the fit or tolerance of the threads rather than the size or pitch? • Compare with other common notations you’ve seen (like 1/4-20 NC-3 or 3/8-16 NF-1). Where does the class usually appear?

✅ Before You Answer

• Identify which part of 1/2-13 NC-2 is the major diameter (screw size) • Identify which part is the threads per inch (TPI) • Identify which part is the thread series (coarse vs fine) and which remaining part is the thread class (fit)

Question 1 of 27070

Q

What class of screw thread is indicated with a machine screw described as 1/2-13 NC-2?

A

1/2

B

13

C

NC

D

2

Question 1 / 270705eccef9bbacbc34ba4d451d0

Question 1 of 270705eccef9bbacbc34ba4d451d0

What class of screw thread is indicated with a machine screw described as 1/2-13 NC-2?

Back

Question 1 of 27070

Q

What class of screw thread is indicated with a machine screw described as 1/2-13 NC-2?

🔍 Key Concepts

• How machine screw sizes are written (diameter – threads per inch – series – class) • Difference between diameter, threads per inch (TPI), thread series (NC/UNF), and thread class (fit) • Location of the thread class number in a standard screw designation

💭 Think About

• Break down what each part of 1/2-13 NC-2 represents. Which part shows the size? Which shows how tight/loose the fit is? • Ask yourself: which part (number or letters) usually tells you the fit or tolerance of the threads rather than the size or pitch? • Compare with other common notations you’ve seen (like 1/4-20 NC-3 or 3/8-16 NF-1). Where does the class usually appear?

✅ Before You Answer

• Identify which part of 1/2-13 NC-2 is the major diameter (screw size) • Identify which part is the threads per inch (TPI) • Identify which part is the thread series (coarse vs fine) and which remaining part is the thread class (fit)