Family Owned & Operated Since 1973

Heavy-Duty U-Bolts

AJAX Fasteners supplies heavy-duty U-bolts for structural steel, infrastructure, marine, and industrial equipment applications. Built for high-load performance and demanding environments, our U-bolts are available in large diameters and project-based quantities to keep installations moving on schedule.

  • Diameters from 1/4″ to 2″
  • Round and square configurations
  • Structural ASTM grades available
  • Stainless and galvanized options
  • Rapid processing and shipment available
square u bolts
round u bolts

Round & Square U-Bolts

We supply both round and square heavy-duty U-bolts engineered for structural and mounting applications where strength and precision matter.

Available with custom leg lengths and thread specifications to match project drawings and field conditions.

Structural Materials & ASTM Grades

Our heavy-duty U-bolts are available in:

  • ASTM A36 / A307
  • ASTM A193 Grade B7
  • ASTM F1554 Grades 36, 55, 105
  • 18-8 Stainless Steel
  • 316 Stainless Steel

Mill Test Reports available to support material traceability and inspection requirements.

Corrosion-Resistant Finishes

  • Plain
  • Zinc-Plated
  • Hot-Dip Galvanized
  • Specialty coatings upon request

Suitable for exterior exposure, marine environments, and utility infrastructure.

Why Contractors Choose AJAX for U-Bolts

  • Heavy-duty industrial focus
  • In-house cutting and threading capabilities
  • Project-based quantities and bulk supply
  • Fast turnaround to meet critical deadlines
  • Trusted supplier since 1973

We support structural steel fabricators, contractors, OEMs, and project engineers who require strength, compliance, and speed.

Need U-Bolts on a Tight Timeline?

Call 904-353-4783 or request a quote online to confirm availability and lead times.