Home > U-Bolts > 304 Stainless Steel U-Bolt, 3" Pipe

3" 304 Stainless Steel U-Bolt | Corrosion Resistant Pipe Support

Expert Overview

This 3" pipe U-bolt, constructed from premium 304 stainless steel, offers exceptional corrosion resistance and durability. Precisely engineered for secure pipe mounting and long-term structural integrity in demanding applications.

StandardASTM A106
Material304 Stainless Steel
FinishBlack Oxide
GradeN/A
Inside Width ( A)4.99"
Inside Length ( B)2.11"
Thread Size1/2"-13

Detailed Engineering Specifications

Engineered for reliability and performance, this 304 stainless steel U-bolt is designed to securely fasten and support 3-inch nominal diameter piping systems. Featuring an inside width (A) of 4.99 inches and an inside length (B) of 2.11 inches, it provides a robust grip. The 1/2"-13 UNC thread size ensures compatibility with standard fastening hardware. Fabricated from 304 stainless steel, this U-bolt exhibits superior resistance to oxidation, corrosion, and pitting, making it ideal for marine, chemical processing, food and beverage, and outdoor environments where environmental degradation is a concern. Its inherent strength and durability guarantee sustained performance under static and dynamic load conditions, minimizing maintenance requirements and extending the service life of the supported infrastructure.

🧊 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."
Market Rank
🏆 Global Innovation Leader
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🚀 Aviation & Medical Approved
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🛡️ Premium Performance Guarantee
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🌱 100% Renewable Energy HQ
Certified:ISO 9001, ISO 14001
LoctiteEst. 1953
Germany🇩🇪
"Industrial adhesives and sealants."
Market Rank
🏆 #1 Global Adhesives
Industry Approvals
🚀 Formula 1 & Aerospace OEM
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🛡️ 24/7 Application Support
Green Manufacturing
🌱 Climate Positive 2030
Certified:ISO 9001, IATF 16949
McMaster-CarrEst. 1901
USA🇺🇸
"Complete industrial supply."
Market Rank
🏆 #1 Industrial Supply Standard
Industry Approvals
🚀 US Military Approved
Warranty & Support
🛡️ 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 through the mounting surface (e.g., beam, bracket). 2. Thread the nuts onto the U-bolt legs, ensuring even tightening on both sides. 3. Torque nuts to the manufacturer's recommended specification for the pipe size and application to ensure secure fastening without over-stressing the pipe or mounting hardware.

Equivalent Standards (Cross-Reference)

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

Mechanical Properties

Tensile Strength75,000 psi (515 MPa)
Yield Strength30,000 psi (205 MPa)
Elongation in 2 in.40% min
HardnessRockwell B95 max

Chemical Composition

Carbon (C)0.08% max
Chromium (Cr)18.0 - 20.0%
Nickel (Ni)8.0 - 10.5%
Manganese (Mn)2.00% max

Temperature & Environment Rating

Min Operating Temp
-320°F (-195°C)
Max Continuous Temp
1400°F (760°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 / ExposedExcellent
Marine / SaltwaterGood
Chemical / AcidicNot Recommended

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Using carbon steel U-bolts in corrosive environments.Always select 304 or 316 stainless steel U-bolts for applications exposed to moisture, chemicals, or saltwater to prevent rapid corrosion and failure.
Over-tightening U-bolt nuts, which can deform the pipe or mounting surface.Use a torque wrench and adhere to the recommended torque specifications for the fastener size and material to prevent damage and ensure proper load distribution.
Selecting a U-bolt with incorrect dimensions for the pipe or mounting hardware.Verify that the U-bolt's inside width and length are appropriate for the pipe's outer diameter and the thickness of the mounting material, and ensure thread compatibility.

Common Applications

  • Marine piping support
  • Chemical processing equipment mounting
  • Food and beverage processing lines
  • Outdoor conduit and pipe securing
  • Structural support for plumbing systems

⚠️ Engineering Warnings

  • Ensure all fastening hardware (nuts, washers) is also made of 304 stainless steel to prevent galvanic corrosion.
  • Do not exceed the maximum load capacity specified for this U-bolt and its associated mounting system.

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 304 Stainless Steel U-Bolt, 3" Pipe made from?

A: This 304 Stainless Steel U-Bolt, 3" Pipe is manufactured from 304 Stainless Steel.

Q: What are the main applications?

A: Marine piping support, Chemical processing equipment mounting, Food and beverage processing lines, Outdoor conduit and pipe securing, Structural support for plumbing systems.

Technical Schematic

U-BOLT DIMENSIONAL DIAGRAMASME B18.31.5PIPE1"NUTNUTA = 4.99"B2.11"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.