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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 & shaftsThe 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

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22 There Are Two Types of ThreadsUNC 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

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26 Once we have drilled the appropriate sized hole

27 We choose the appropriate tap

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29 The Drill & Tap Process

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