S-91864A026 8-32 x 1 3/8" 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
- 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 superior precision and tighter tolerances for secure, vibration-resistant assemblies in demanding applications.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance, extending service life in harsh industrial environments.
- Partially threaded design with 7/8" minimum thread length allows for optimal grip and easier alignment in pre-tapped holes or nuts.
- Hex socket drive (9/64") enables high-torque installation with standard tools, minimizing stripping and improving assembly efficiency.
- Rockwell C37 hardness combines durability with machinability, resisting wear while maintaining ease of use.
- Compliance with ASTM A574, RoHS 3, and REACH ensures adherence to industry standards for safety, quality, and environmental regulations.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw with 8-32 UNC coarse threads is engineered to address common industrial challenges such as vibration loosening and corrosion in machinery, automotive, and heavy equipment assemblies. The Class 3A fit and partially threaded rod type provide precise engagement, reducing the need for re-tapping and minimizing assembly errors. Its high tensile strength and Rockwell C37 hardness ensure long-term reliability in dynamic loads, while the black-oxide surface treatment protects against rust without compromising dimensional stability. Ideal for applications requiring repeated disassembly, this fastener delivers consistent performance in industrial fastening systems where durability and compliance are critical.
Specification Summary & Compliance
This screw features 8-32 UNC coarse threads with a Class 3A thread fit for high precision, and a length of 1 3/8" with a minimum thread length of 7/8". It meets manufacturing specifications per ASTM A574 and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and quality standards in industrial use.
