S-90044A288 2-56 x 1 3/4" 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
- Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
- Class 3A thread fit provides tighter tolerances for superior thread engagement and vibration resistance in precision assemblies.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance, extending service life in demanding industrial environments.
- Partially threaded design allows for precise clamping force control, ideal for applications requiring specific grip lengths.
- Hex socket drive (5/64") enables high-torque installation with standard tools, minimizing stripping and improving assembly efficiency.
- Rockwell C37 hardness balances durability with machinability, resisting wear while maintaining ease of installation.
- Coarse UNC threads facilitate quick assembly and disassembly, reducing labor time in maintenance and production cycles.
Professional Applications & Engineering Value
These black-oxide alloy steel socket head cap screws are engineered to address critical challenges in industrial fastening, such as vibration-induced loosening and corrosion in harsh environments. The 2-56 UNC coarse thread design ensures rapid installation in metals and plastics, while the partial threading provides optimal stress distribution for components requiring precise unthreaded shank sections. With a 170,000 psi tensile strength and Rockwell C37 hardness, they withstand heavy loads and repetitive use in machinery, automotive, and aerospace assemblies. The hex drive and standardized dimensions allow for seamless integration with existing tooling, reducing downtime and enhancing workflow efficiency in B2B procurement scenarios.
Specification Summary & Compliance
This product adheres to Class 3A thread fit for high-precision applications, with UNC coarse threads and a minimum thread length of 5/8". Manufactured in compliance with ASTM A574 specifications, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safety and regulatory alignment for global industrial use.
