S-91286A241 3/8"-24 x 3/4" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional tensile strength of 150,000 PSI ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Superior corrosion resistance provided by the zinc-flake coating extends service life in harsh industrial environments.
- High hardness rating (Rockwell C33) offers excellent wear resistance, maintaining thread integrity through repeated use.
- Precision Class 2A thread fit guarantees smooth installation and secure fastening with compatible nuts.
- Full threading design allows for maximum grip length and adjustment flexibility in assembly applications.
- External hex drive enables high-torque installation with standard tools, speeding up maintenance and assembly processes.
- Compliance with major standards including ASME B18.2.1 and SAE J429 ensures consistent quality and interchangeability.
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these Grade 8 hex head screws deliver critical reliability where failure is not an option. The zinc-flake coated steel construction provides superior protection against corrosion in challenging environments from manufacturing plants to outdoor equipment. The 3/8"-24 UNF fine thread configuration offers enhanced vibration resistance compared to coarse threads, making these heavy-duty screws ideal for machinery, automotive assemblies, and structural frameworks where dynamic loads are present. The combination of 150,000 PSI tensile strength and Rockwell C33 hardness ensures these fasteners maintain clamp force under extreme conditions, solving common engineering challenges related to joint integrity and long-term performance.
Specification Summary & Compliance
This 3/4" length hex head screw features precision Class 2A thread fit with 3/8"-24 UNF fine spacing manufactured to ASME B18.2.1 and SAE J429 specifications. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industries while maintaining consistent dimensional accuracy and mechanical properties.
