BIBLIOGRAPHIC CITATIONS

Works Cited

1. Ms. Norisza Dalila. Material and Hardware​​. Selangor : Politeknik Banting Selangor.

2. http://bangalore.all.biz/trapezoidal-thread-screw-g602195

3. http://www.philholdenfasteners.co.uk/evolution-screw-threads/

4. Wikimedia Commons

5. tinyshopww.blogspot.com

6. www.fastenal.com

• https://3bp.Blogspot.com/-m-GGsQijExau/UwzdmSSkGI

• https://encryted-tbn0.Gstatic.com

• www.slideshare.net/bolts

• www.slideshare.net/chapter4-thread

• www.youtube/PLsTmHciE9DjNA8GapAjtq5bz-dgxF4Kom

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