STS Industrial - Bolts & Screws




A U-Bolt is a U shaped bolt with threaded legs protruding from a curved base. U-Bolts are used to attach pipe to varying types of structures. U-Bolts are specified by Thread Diameter and Pipe Diameter (i.e. 3/8″ X 2″).  Standard U-Bolts are used for mounting pipe to structural material, and are meant to be tightened down snug against the pipe’s outer diameter. For U-Bolts with longer “legs”, see Long Tangent U-Bolts.

  • Carbon Steel
    • Zinc Plated
    • Hot Dipped Galvanized
  • 304 Stainless Steel

Standard U-Bolt


U-Bolt Dimensional Drawing

Standard U-Bolt Dimensions

Dimensions are typical for the sizes shown. Tolerances may vary. Not all sizes available in all materials and finishes.

Sources: ASTM Standards for Mechanical Fasteners and Related Processes 2nd Edition, Inch Fastener Standards 8th Edition, Kanebridge Fastener Reference Guide 4th Edition

Note: All material included on this page is informational only, and should not be used as one’s sole source for design purposes. STS Industrial, Inc. and its affiliates do not guarantee the accuracy of the information on this site, and retain no liability for the use or misuse of the information contained on this site.