Do pole line machine bolts have the same thread lengths as your “off the shelf” bolt?

Pole line machine bolts that are short in length (up to 3″) have the same thread length as a standard, “off the shelf” bolt, however, when they reach longer lengths, they have longer thread lengths specific to their application. Below is a chart showing how the thread lengths differ depending on the bolt size.

*Bolts shorter and/or smaller than those listed in the table shall have minimum thread lengths in accordance with American National Standard for Square and  Hex Bolts and Screws, B18.2.1*
Diameters Bolt length Thread length
  • 3/8"
  • 1/2"
  • 5/8"
  • 3/4"
  • 7/8"
  • 1"
 4" up to less than 8" 3"
  • 3/8"
  • 1/2"
  • 5/8"
  • 3/4"
  • 7/8"
  • 1"
  • 1-1/4"
 8" up to less than 12" 4"
  • 3/8"
  • 1/2"
  • 5/8"
  • 3/4"
  • 7/8"
  • 1"
  • 1-1/4"
 12" and over 6"
 

Comments are closed.