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304 Stainless Steel U-Bolt for 3" Pipe - 4" Width x 6.5" Length

Expert Overview

Engineered for superior corrosion resistance and strength, this 304 stainless steel U-bolt is designed to securely fasten 3" pipes in demanding environments. Its robust construction ensures reliable support for critical infrastructure.

StandardASME B18
Material304 Stainless Steel
FinishGalvanized
GradeN/A
Inside Width ( A)4.01"
Inside Length ( B)6.53"
Thread Size1/2"-13

Detailed Engineering Specifications

Purpose-built for heavy-duty applications, this U-bolt is manufactured from premium 304 stainless steel, offering exceptional resistance to corrosion, oxidation, and pitting, making it ideal for marine, chemical processing, and outdoor installations. With an inside width (A) of 4.01 inches and an inside length (B) of 6.53 inches, it is precisely engineered to accommodate standard 3-inch nominal pipe sizes. The 1/2"-13 UNC thread size ensures a secure and reliable connection when paired with appropriate nuts and washers, providing robust structural support and vibration dampening.

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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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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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Certified:ISO 9001, IATF 16949
McMaster-CarrEst. 1901
USA🇺🇸
"Complete industrial supply."
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🏆 #1 Industrial Supply Standard
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🚀 US Military Approved
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🛡️ Lifetime Return Policy
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🌱 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 3" pipe, ensuring it rests evenly on the pipe's exterior. 2. Align the threaded legs of the U-bolt with the mounting surface or supporting structure, and loosely thread on nuts. 3. Gradually tighten the nuts in an alternating pattern to ensure even pressure distribution and a secure fit, verifying the pipe remains stable.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardASME B18

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 standard steel U-bolts in corrosive environments.Always select 304 or 316 stainless steel for applications exposed to moisture, chemicals, or saltwater to prevent premature corrosion and failure.
Overtightening nuts, which can deform the pipe or U-bolt.Tighten nuts until snug and secure, ensuring the pipe is held firmly without crushing or distorting its shape. Use a torque wrench if specified for the application.

Common Applications

  • Pipe support in chemical plants
  • Marine hull and deck fittings
  • Exhaust system mounting
  • Plumbing and HVAC installations
  • Structural framing and bracing

⚠️ Engineering Warnings

  • Ensure nuts and washers are also made of 304 stainless steel to maintain corrosion resistance.
  • Verify thread compatibility (1/2"-13 UNC) with securing hardware before installation.

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: Pipe support in chemical plants, Marine hull and deck fittings, Exhaust system mounting, Plumbing and HVAC installations, Structural framing and bracing.

Technical Schematic

U-BOLT DIMENSIONAL DIAGRAMASME B18.31.5PIPE1"NUTNUTA = 4.01"B6.53"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.