Overview of different Thread Standards

Overview of different Thread Standards

Overview of different Thread Standards

English: Screws with different thread types. From left to right:
  • Metric M12, 40 mm long (ISO 4017, Strength 8.8)
  • Metric Fine M12x1.25, 40mm long (ISO 8676, Strength 8.8)
  • Metric Fine M12x1.5, 40mm long
  • United thread Standard Coarse UNC 1/2 inch, 1.5 inch long (Strength Grade 5 ( ~ 8.8 ). Dimensions in metric would be 12.7mm by 38.1mm)
  • United thread Standard Fine UNF 1/2 inch, 1.5 inch long (Strength Grade 5 ( ~ 8.8 ). Dimensions in metric would be 12.7mm by 38.1mm)
  • British Withworth BSW 1/2 inch, 1.5 inch long. (Dimensions in metric would be 12.7mm by 38.1mm)
All screws with hex bolt heads, although they also differ slightly in size depending on the standard.

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By Christoph Roser at AllAboutLean.com under the free CC-BY-SA 4.0 license.

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