Difference between revisions of "Machine Screw"

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(Created page with "The machine screw is an element of construction, a type of threaded fastener. Example: Standard Cap Screws File:machine-screw01.png Example: Standard Machine Screw Head ...")
 
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The machine screw is an element of construction, a type of threaded fastener.   
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The machine screw is an element of construction, a type of threaded fastener.  A machine screw is typically designed to be fastened to an existing, tapped hole on a metal surface.   
  
 
Example: Standard Cap Screws
 
Example: Standard Cap Screws
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Example: Standard Machine Screw Head Types
 
Example: Standard Machine Screw Head Types
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Screw bit types:
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* Slotted
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* Phillips
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* Combination
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* Torx
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* Star
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* Hex (internal)
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* Hex (external)
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* JIS
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* Phillips Square
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* Square
  
 
[[File:machine-screw02.png]]
 
[[File:machine-screw02.png]]
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the standard [[Computer Case Screw]] size is 6-32. 
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== Unified Thread Standard (UTS) ==
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The following formula is used to calculate the major diameter of a numbered screw greater than or equal to 0: Major diameter = Screw # × 0.013" + 0.060". For example, a number 10 calculates as: #10 × 0.013" + 0.060" = 0.190" major diameter.
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Example: #6-32 UNC 2B (major diameter: 0.1380 inch, pitch: 32 tpi)
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ASME, the American Society of Mechanical Engineers, has a document called ASME B1.1 that provides requirements for unified inch screw threads.
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Latest revision as of 07:42, 12 June 2019

The machine screw is an element of construction, a type of threaded fastener. A machine screw is typically designed to be fastened to an existing, tapped hole on a metal surface.

Example: Standard Cap Screws

Machine-screw01.png

Example: Standard Machine Screw Head Types

Screw bit types:

  • Slotted
  • Phillips
  • Combination
  • Torx
  • Star
  • Hex (internal)
  • Hex (external)
  • JIS
  • Phillips Square
  • Square

Machine-screw02.png

the standard Computer Case Screw size is 6-32.

Unified Thread Standard (UTS)

The following formula is used to calculate the major diameter of a numbered screw greater than or equal to 0: Major diameter = Screw # × 0.013" + 0.060". For example, a number 10 calculates as: #10 × 0.013" + 0.060" = 0.190" major diameter.

Example: #6-32 UNC 2B (major diameter: 0.1380 inch, pitch: 32 tpi)

ASME, the American Society of Mechanical Engineers, has a document called ASME B1.1 that provides requirements for unified inch screw threads.

 

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