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M18 x 35mm 304 Stainless Steel Hex Head Cap Screw

Expert Overview

Engineered for robust performance, this M18 x 35mm hex head cap screw is forged from premium 304 stainless steel. Its superior corrosion resistance and high tensile strength make it ideal for critical structural and mechanical assemblies.

StandardASME B18
Material304 Stainless Steel
FinishAnodized
GradeN/A
SizeM18
Length35mm
Head Width32mm

Detailed Engineering Specifications

Precision-manufactured to tight tolerances, this M18 x 35mm hex head cap screw boasts a nominal diameter of 18mm and a length of 35mm, ensuring accurate fitment in pre-drilled holes and mating components. The head features a uniform 32mm width, allowing for optimal torque application with standard tooling. Composed of 304 stainless steel, this fastener exhibits excellent resistance to rust, pitting, and general corrosion, even in harsh environments including marine, chemical processing, and outdoor exposure. Its inherent ductility and formability, coupled with good toughness, contribute to its reliable performance under static and moderate dynamic loads. The unthreaded shank section, when applicable, further enhances shear strength and alignment.

🧊 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.

BossardEst. 1831
Switzerland🇨🇭
"Global leader in fastening technology."
Market Rank
🏆 Top 3 Global Fastener Network
Industry Approvals
🚀 Aerospace & Tesla Approved
Warranty & Support
🛡️ Lifetime Traceability
Green Manufacturing
🌱 Carbon Neutral by 2030
Certified:ISO 9001, RoHS, REACH
Würth GroupEst. 1945
Germany🇩🇪
"Premium assembly and fastening materials."
Market Rank
🏆 #1 Global Assembly Supplier
Industry Approvals
🚀 VW & BMW OEM
Warranty & Support
🛡️ 5-Year Industrial Warranty
Green Manufacturing
🌱 100% Recyclable Packaging
Certified:ISO 9001, DIN EN
Brighton-BestEst. 1925
USA🇺🇸
"Master distributor of industrial fasteners."
Market Rank
🏆 Largest Distributor in NA
Industry Approvals
🚀 Boeing Approved
Warranty & Support
🛡️ Global Replacement Guarantee
Green Manufacturing
🌱 Green Steel Initiative
Certified:ISO 9001, A2LA

Certifications & Compliance

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

Installation Procedure

1. Select the appropriate wrench or socket size (32mm head width) for the hex head cap screw. 2. Ensure the mating threaded hole or nut is clean and free from debris. 3. Thread the cap screw by hand to confirm proper engagement and prevent cross-threading. 4. Tighten the cap screw to the recommended torque specification for the application, utilizing a calibrated torque wrench for critical assemblies.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 898-1 / ISO 4014
DIN EquivalentDIN 931 / DIN 933
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

Recommended Torque Values

Bolt SizeDry Torque (ft-lbs)Lubricated Torque (ft-lbs)
M18Check CalculatorReduce by 25%

Weight Reference Table

Size / TypeEst. Weight (lbs/100)Shipping Weight (kg)
M18Varies 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 an incorrect tool size, leading to head stripping.Always use a 32mm wrench or socket that fits snugly on the hex head.
Cross-threading the screw by forcing it into the hole.Start threading by hand to ensure smooth engagement before applying torque.
Over-tightening, which can strip threads or cause material fatigue.Use a torque wrench and adhere to application-specific torque values.

Common Applications

  • Structural steel connections
  • Machinery and equipment assembly
  • Marine hardware and fittings
  • Outdoor and corrosive environment applications

⚠️ Engineering Warnings

  • Ensure the material compatibility of mating components to prevent galvanic corrosion.
  • For critical load-bearing applications, verify the tensile and shear strength requirements against the fastener's specifications and consider professional engineering review.

Alternative Products to Consider

Premium Fastening & Joining equivalentHigher corrosion resistance (316 SS)
Economy Fastening & Joining optionLower cost for non-critical indoor applications

Frequently Asked Questions

Q: What is the Hex Head Cap Screw, 304 Stainless Steel made from?

A: This Hex Head Cap Screw, 304 Stainless Steel is manufactured from 304 Stainless Steel.

Q: What are the main applications?

A: Structural steel connections, Machinery and equipment assembly, Marine hardware and fittings, Outdoor and corrosive environment applications.

Technical Schematic

HEX BOLT DIAGRAMSAE J429 / ASME B18.2.1HEXHEADLENGTH = 35mmAF32mm1/2"-13TIGHTEN →MECHANICAL PROPERTIESTensile Strength: 150,000 psiThread: 1/2"-13 UNCTorque Direction: Clockwise (CW)Head Marking: 6 radial lines (Grade 8)

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.