THREADS AND FASTENERS - Goodheart-Willcox

Print Reading Activity 11-2
Internal Thread
Refer to the print PR11-2 and answer the following
questions.
1. What is the name of the part?
2. What is the number of the part?
3. What material is specified?
4. How many counterbored holes (C-BORE)
are there on the part?
5. What is the overall outside diameter of
the part?
6. How many threaded holes are there on
this part?
7. What is the diameter of the bolt circle
that serves as a reference for the location
of the threaded holes?
8. What are the location dimensions for the
hole at A?
9. What is the size of the large center
“through” hole?
10. What type of thread representation is
used in this drawing?
Unit 11 Threads And Fasteners 143
1. ______________________________________
2. ______________________________________
3. ______________________________________
4. ______________________________________
5. ______________________________________
6. ______________________________________
7. ______________________________________
8. ______________________________________
9. ______________________________________
10. ______________________________________
144 Print Reading for Industry
Threads Activity 11-3
Thread Interpretation
For numbers 1–9, fill in the blanks for the
sample threads shown in the drawings A–D. Use
the colored lines as guidelines for lettering. Also,
answer A, B, and C for number 10.
1 1
2 – 8 UNC – 2A
FULL SCALE
HALF SCALE
A B C D
.625 – 18UNF–2A LH TRIPLE
LETTER THE INFORMATION FOR FIGURES A THROUGH D IN THE SPACES BELOW:
A B C D
1. NO THREADS/INCH
2. PITCH OF THREAD
3. THREAD FORM
4. RH/LH?
5. SINGLE OR WHICH?
6. LEAD OF THREAD
7. MAJOR DIAMETER
8. INTERNAL/EXTERNAL?
9. HOW REPRESENTED?
M12 X 1.75
10. FOR THE METRIC THREAD:
A. WHAT IS THE MAJOR DIAMETER?
B. WHAT IS THE PITCH?
C. HOW IS IT REPRESENTED?