So You Think You Know Fasteners?

October 16

00:00 2013

Share it With Friends

1/10/2013 1:46:00 AM
FEATURE

January 29, 2002 FIN – The Los Angeles Fastener Association put its membership to a test at its January meeting by conducting a “Who Wants to Be a Millionaire” quiz on fasteners.

Steve Pettyjohn, of Exact Industries and president of LAFA, chose the following questions as the best fastener brainteasers of the night for you to test yourself:

1. Elevator bolts are:
a. Also known as belt bolts
b. Are measured the top of head
c. Have a square neck
d. All of the above

2. Machine screws have a minimum tensile strength of:
a. 60,000 PSI
b. 6,000 PSI
c. 600 PSI

3. What is the thread form when calling out a 1/4-20 socket head cap?
a. UNC-2A
b. UNC-3A
c. UNF-2A
d. UNF-3A

4. Which of these in NOT a tensile fastener?
a. Flat head socket cap
b. Button head socket cap
c. Socket head cap
d. Socket set screw

5. What ASTM spec is similar in strength and material requirements with SAE J429 Grade 5?
a. ASTM A354
b. ASTM A449
c. ASTM A490

6. Grade 2 carriage bolts are required to have what headmarking?
a. No headmark
b. Manufacturer’s ID headmark
c. A307 headmarking
d. Both b & c

7. Undersized wire is typically used to manufacture bolts that are:
a. Roll thread
b. Cut thread
c. None of the above

8. Name the correct metric term for inch grades:
a. Property classes
b. Grades
c. None of the above

9. Roll pins are also known as:
a. Spring pins
b. Expansion pins
c. Tension pins
d. All of the above

10.When tightening a bolt, ideally you are trying to reach what percentage of yield strength?
a. 100%
b. 80%
c. 50%
d. 33.5%

Answers: 1. D; 2. A; 3. B; 4. D; 5. B; 6. B; 7. A; 8. A; 9. D; 10. B

The fastener quiz show idea came from the final exam for LAFA’s Certified Fastener Specialist training program. The program was started in 1998 in part as a response to issues raised by the U.S. Fastener Quality Act. ©2013 GlobalFastenerNews.com

Global Fastener News