Home > U-Bolts > Carbon Steel U-Bolt, 3" Pipe

3" Carbon Steel U-Bolt | 3.25" W x 6.97" L | 1/2"-13 Thread

Expert Overview

Engineered for robust pipe securing in demanding industrial applications, this 3-inch carbon steel U-bolt offers superior strength and corrosion resistance. Its precise dimensions ensure a reliable and long-lasting hold for your piping systems.

StandardASTM A106
MaterialCarbon Steel
FinishAnodized
GradeN/A
Inside Width ( A)3.25"
Inside Length ( B)6.97"
Thread Size1/2"-13

Detailed Engineering Specifications

Designed for demanding industrial environments, this carbon steel U-bolt provides secure and reliable support for 3-inch nominal pipe sizes. Featuring an inside width (A) of 3.25 inches and an inside length (B) of 6.97 inches, it offers ample clearance for insulation or pipe coatings. The robust 1/2"-13 UNC thread size ensures a strong connection with compatible nuts and washers (sold separately). Manufactured from high-grade carbon steel, it exhibits excellent tensile strength and resistance to mechanical stress, making it ideal for structural bracing, conduit mounting, and general pipe suspension in construction, manufacturing, and utility sectors.

🧊 Download 3D CAD Model (.STEP)

Verified Global OEM Partners

This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.

3MEst. 1902
USA🇺🇸
"Science applied to life."
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Certified:ISO 9001, ISO 14001
LoctiteEst. 1953
Germany🇩🇪
"Industrial adhesives and sealants."
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🏆 #1 Global Adhesives
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🚀 Formula 1 & Aerospace OEM
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🛡️ 24/7 Application Support
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🌱 Climate Positive 2030
Certified:ISO 9001, IATF 16949
McMaster-CarrEst. 1901
USA🇺🇸
"Complete industrial supply."
Market Rank
🏆 #1 Industrial Supply Standard
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🚀 US Military Approved
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🛡️ Lifetime Return Policy
Green Manufacturing
🌱 Sustainable Logistics
Certified:ISO 9001 Compliant

Certifications & Compliance

RoHS Compliant:Yes
REACH Compliant:Yes
Material Traceability:Available on Request
DFARS Compliant:Yes

Installation Procedure

1. Position the U-bolt around the pipe and the mounting surface. 2. Thread the nuts onto the U-bolt legs, ensuring even engagement. 3. Tighten nuts progressively and evenly until the pipe is securely held, but avoid overtightening to prevent deformation.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardASTM A106

Mechanical Properties

Tensile StrengthStandard Commercial Spec
Yield StrengthStandard Commercial Spec
HardnessVaries by specific batch

Chemical Composition

Carbon (C)0.28 - 0.55%
Manganese (Mn)0.60 - 0.90%
Phosphorus (P)0.04% max
Sulfur (S)0.05% max

Temperature & Environment Rating

Min Operating Temp
-20°F (-29°C)
Max Continuous Temp
400°F (204°C)
Thermal Expansion
Typical for Material Class

Weight Reference Table

Size / TypeEst. Weight (lbs/100)Shipping Weight (kg)
StandardVaries by dimensionContact Sales

Corrosion Resistance Guide

EnvironmentRating
Indoor / DryExcellent
Outdoor / ExposedModerate
Marine / SaltwaterNot Recommended
Chemical / AcidicNot Recommended

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Using the wrong size U-bolt for the pipe diameter.Always select a U-bolt with an inside diameter slightly larger than the nominal pipe size to accommodate potential insulation or coatings.
Overtightening nuts, which can deform the pipe or the U-bolt.Tighten nuts evenly and progressively until snug, then apply a final tightening turn, but do not strip threads or visibly distort components.

Common Applications

  • Pipe support and bracing in industrial facilities
  • Conduit and cable tray mounting
  • Structural anchoring for mechanical systems

⚠️ Engineering Warnings

  • Ensure nuts and washers are compatible with the U-bolt thread size for optimal performance.
  • Inspect U-bolts regularly for signs of corrosion, wear, or damage in harsh environments.

Alternative Products to Consider

Premium U-Bolts equivalentHigher corrosion resistance (316 SS)
Economy U-Bolts optionLower cost for non-critical indoor applications

Frequently Asked Questions

Q: What is the Carbon Steel U-Bolt, 3" Pipe made from?

A: This Carbon Steel U-Bolt, 3" Pipe is manufactured from Carbon Steel.

Q: What are the main applications?

A: Pipe support and bracing in industrial facilities, Conduit and cable tray mounting, Structural anchoring for mechanical systems.

Technical Schematic

U-BOLT DIMENSIONAL DIAGRAMASME B18.31.5PIPE1"NUTNUTA = 3.25"B6.97"C1-1/4"Thread: 1/2"-13 | Both Legs2 Hex Nuts Included

Torque Specifications

⚡ UNIT CONVERTER

Conversion factor: 1 ft-lb ≈ 1.356 Nm

Verified Compatibility

StatusMating ComponentStandardTorque SpecEngineering Notes
No verified compatibility data found for this component.