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Hex Bolts Information

  • Hex Bolts are also commonly referred to as Machine Bolts, and are often used interchangeably with Hex Head Cap Screws. Although there are small differences, they are largely interchangeable.
  • Hex Bolts are designed for use with a Nut and often a Washer. Thread pitch, material, and finish for paired Bolts and Nuts should match.
  • Thread length will vary depending on the bolt length and manufacturer. Call us if you would like to know the thread length of a specific size of Hex Bolt in our stock.
  • We sell Hex Bolts in Grade A307, Grade 5, and Grade 8. They are Available in Plain Finish, Zinc Plated, Hot Dipped Galvanized, and Stainless Steel. Higher Grades (Grade 5 & 8) are only available in Zinc/Yellow Zinc Plating.
  • The true length of many bolts can commonly be up to 3/16" short of the stated length.

Hex Bolt diameter is the width of the shaft or the outside of the threads.
Hex Bolt length is measured from the underside of the head to the end of the bolt.

Hex Bolt Head Size Chart  Hex Bolt Grade Marking/Strength Chart

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