4. Today’s Plan
Fasteners
Threading

5. Fasteners

6. What is a Fastener?
A hardware device that mechanically joins or affixes two or more objects together

7. Fasteners can be categorized as follows:
Screws Set Screws
Self Tapping Screws Bolts

8. Screws pass through one part and thread into another

9. Screws

10. Screws

11. Screws

12. Set Screws are used to secure things such as pulleys, gears & shafts
The screw passes through a threaded hole in the outer object and is tightened against the inner object
A type of screw generally used to secure an object within another object
Set Screws are used to secure things such as pulleys, gears & shafts

13. Set Screws

14. Self Tapping Screws
Screws that will cut their own threads in a predrilled hold – If the hole is the appropriate size

15. Self Tapping Screws

16. Bolts
Threaded fasteners that hold parts together by squeezing them between the head on one end and a nut on the other

17. Bolts

18. Assignment

19. Threading

20. What is a Thread?
The raised helical rib going around a screw

22. There Are Two Types of Threads
UNC UNF
Unified National Course Unified National Fine

23. How do we thread a hole?

24. First we need to determine what size hole we need to thread

26. Once we have drilled the appropriate sized hole

27. We choose the appropriate tap

29. The Drill & Tap Process