Sheet 3 & 4

 Sheet no. 3

Threads

Q1. a)External and Internal threads on Nut and Bolt ( Right Handed)

b)External and Internal threads on Nut and Bolt (Left Handed)

Q2. Single , Double and Triple Start Threads

Q3. Right and Left Handed Threads

Q4. Representation of Internal and External Threads

Sheet no. 4

Types of Threads

Q1.a) BSW Threads

b) BA Threads

c) American or Seller's Threads

d) Metric Thread or ISO Threads

Q2. a) Square Threads

b) Knuckle Threads

c) Buttress Threads

d)ACME Theards