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|
||4" up to less than 8"||3"|
||8" up to less than 12"||4"|
||12" and over||6"|