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M24 x 121mm 304 Stainless Hex Cap Screw

Expert Overview

This M24 x 121mm hex head cap screw, crafted from premium 304 stainless steel, offers superior corrosion resistance and robust mechanical strength for critical fastening needs.

StandardASME B18
Material304 Stainless Steel
FinishPlain
GradeN/A
SizeM24
Length121mm
Head Width19mm

Detailed Engineering Specifications

Engineered for reliability and performance, this M24 x 121mm hex head cap screw boasts a nominal diameter of 24mm and an overall length of 121mm, ensuring ample thread engagement and secure fastening. The head features a 19mm width, optimized for standard tooling to deliver consistent and controlled torque application. Constructed from 304 stainless steel, it provides exceptional resistance to a wide range of corrosive environments, including saltwater and chemical exposure, making it ideal for marine, chemical processing, and outdoor infrastructure applications where longevity and integrity are paramount.

🧊 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, ensuring it fits snugly onto the 19mm hex head. 2. Thread the cap screw into the pre-tapped hole or mating component by hand until it engages. 3. Apply torque using the wrench or socket to achieve the recommended tightening specification, avoiding over-tightening to prevent thread damage or material deformation.

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)
M24Check CalculatorReduce by 25%

Weight Reference Table

Size / TypeEst. Weight (lbs/100)Shipping Weight (kg)
M24Varies 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 incorrect tool size, leading to stripped hex head.Always use a correctly sized wrench or socket that fully engages the 19mm hex head.
Over-torquing the fastener, causing thread stripping or material fatigue.Adhere to recommended torque specifications for the application and mating materials. Consider using a torque wrench for precision.
Using standard steel fasteners in corrosive environments, leading to premature failure.Utilize 304 stainless steel fasteners like this one for applications exposed to moisture, chemicals, or salt spray to ensure long-term durability.

Common Applications

  • Marine hardware and structural components
  • Chemical processing equipment and piping
  • Outdoor infrastructure and architectural elements

⚠️ Engineering Warnings

  • Ensure compatibility of mating materials to prevent galvanic corrosion when dissimilar metals are in contact.
  • Always use appropriate personal protective equipment (PPE) during installation, such as safety glasses and gloves.

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: Marine hardware and structural components, Chemical processing equipment and piping, Outdoor infrastructure and architectural elements.

Technical Schematic

HEX BOLT DIAGRAMSAE J429 / ASME B18.2.1HEXHEADLENGTH = 121mmAF19mm1/2"-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.