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Machine Drawing by N. D. Junnarkar

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Chapter 9

Screw Fasteners

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This chapter contains information on screw fasteners

After reading the chapter you will be able to

  • understand screw features
  • identify thread forms
  • identify right and left hand threading
  • specify nuts and bolts with their applications
9.1 SCREW FASTENERS

A screw thread is used for temporary locking of two components. By cutting a helical groove on a cylindrical surface, screw thread can be generated. The external threaded rod is the screw and internal threaded hole is the nut. The screw thread can be cut on a lathe machine or by means of a die set and a nut can be made by tap set. A small hole is first drilled in ...

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