S-91864A022 5-40 x 7/8" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket 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
- Superior corrosion resistance with black-oxide coating, extending service life in demanding industrial environments
- Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress applications
- Precision Class 3A thread fit provides secure fastening with minimal backlash in critical assemblies
- Rockwell C37 hardness maintains structural integrity and prevents deformation during installation
- Hex socket drive design allows for high-torque installation in confined spaces with standard tools
- Full threading along 7/8" length enables adjustable positioning and uniform load distribution
- Regulatory compliance with ASTM A574, RoHS 3, and REACH standards ensures environmental and safety adherence
Professional Applications & Engineering Value
Engineered for high-performance industrial applications, these black-oxide alloy steel socket head cap screws address critical challenges in machinery assembly, automotive components, and precision equipment. The 5-40 UNC coarse thread configuration combined with Class 3A thread fit delivers vibration-resistant fastening while accommodating thermal expansion in metal-to-metal joints. The hex drive socket head design provides superior torque transmission compared to standard fasteners, reducing installation time and preventing tool slippage. With 170,000 psi tensile strength and corrosion-resistant surface treatment, these screws maintain clamping force integrity in high-load environments where reliability is paramount for operational safety and reduced maintenance intervals.
Specification Summary & Compliance
Manufactured to ASTM A574 specifications with Class 3A thread fit precision and UNC coarse thread spacing. The inch-system socket head cap screw features 5-40 thread size, 7/8" fully threaded length, and right-hand thread direction. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring restricted substance adherence for global industrial applications.
