G.L. Huyett has acquired AZ Lifting Hardware
Round Keys

Round keys, also called pin keys, round machine keys, Scotch keys, or Dutch keys, are cylindrical keys inserted into a cylindrical key way that has been drilled and reamed partly in the shaft and partly in the hub while the application is assembled. A tight interference fit is required between the key and the key way to ensure uniformity along the length of the key. Round keys are cut from keystock to lengths under 12 inches long.

  • Offered in Carbon Steel and Stainless Steel
  • Available in both Inch and Metric sizes
  • Lower stress concentration as compared to other key designs
  • Visit our Product FAQs to learn more about Key Stock & Machine Keys
Round Keys

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  • Carbon Steel
  • Stainless Steel
  • Plain
  • None
  • Inch
  • Metric
  • .750" (3/4)
  • 1.000" (1)
  • 1.375" (1-3/8)
  • 2.313" (2-5/16)
  • 2.500" (2-1/2)
  • 2.750" (2-3/4)
  • 3.000" (3)
  • 6.000" (6)
  • M120.00
  • M171.45
  • 300 Series
  • Low Carbon
  • Medium Carbon