1. EML 2023 – Threads and Fasteners
Lecture 2 - Threads and Fasteners in SolidWorks

2. 2 things to remember if you tap a hole
the thread length should be at least twice the diameter of the fastener
if you use a bolt to connect some bodies
the bolt should extend beyond the nut by at least two thread pitches

3. #10-24 cap screw .30” .75” minimum length was calculated as:
.19 = .68”
purchased a screw that was .75” long
create a countersunk clearance hole in the top part
create a tapped hole in the bottom part
the thread depth must be at least .45” long
.30”
.75”

6. 2nd Example Problem
3/8” – 24 cap screw
blocks are 1.5”1.5”.55”

7. 2 things to remember if you tap a hole
the thread length should be at least twice the diameter of the fastener
if you use a bolt to connect some bodies
the bolt should extend beyond the nut by at least two thread pitches

8. Determining Bolt Length
.55

11. Bolt length calculation
Bolt must be 1.988” long plus the distance of 2 extra pitches.
The bolt has 24 threads per inch. Two extra pitches will require an extra 1/12” of an inch.
Total minimum length is = 2.221” .
Find the next longest available bolt.
.55”
2.138”
.08”
21/64”

12. 2 things to remember if you tap a hole
the thread length should be at least twice the diameter of the fastener
if you use a bolt to connect some bodies
the bolt should extend beyond the nut by at least two thread pitches