Use the Machinerys Handbook as necessary to answer the follo

Use the \"Machinery\'s Handbook\" as necessary to answer the following questions: How many threads per inch are there on a 3/8 inch UNC (Unified National Coarse Pitch) series fastener? 16 per inch How many threads per inch are there on a 3/8 inch UNEF (Extra Fine Pitch) fastener? 32 per inch Determine the type of screw thread based on the following measurements: + 215 diameter measured across the screw threads. +Length of the screw is 0.375\" Total number of threads is about 10. Determine the head diameter for a .500-20 UNC Socket Head Cap Screw. About how many threads would there be on an M8 X 1.25 fastener that is 16mm long? What size wrench is needed for a 5/16-18 UNC hex head bolt (i.e. width across the flats)?

Solution

3) Threads per Inch=26, from tables it can be Unified Fine

4) 0.750 Inch

5) Pitch=Threads/Unit Length, therefore Number of Threads= Pitch x Length = 1.25 x 16 = 20

6) 0.500 Inch