S-90044A513 8-32 x 2 1/4" ASME B18.3, 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.
- Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life in demanding industrial environments.
- Precise Class 3A thread fit provides secure, vibration-resistant fastening with minimal risk of loosening.
- Coarse UNRC threading allows for quick installation and removal, saving valuable assembly time.
- Hex socket drive design offers high torque transmission and tool accessibility in confined spaces.
- Full threading along the 2-1/4" length enables adjustable positioning and uniform clamping force distribution.
- Compliance with ASME B18.3 and ASTM A574 guarantees consistent quality and interchangeability with standard components.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in industrial assembly, such as vibration-induced loosening and corrosion in harsh operating conditions. The coarse UNRC thread and Class 3A fit ensure a tight, reliable connection that withstands dynamic loads, making it ideal for machinery, automotive, and heavy equipment applications. Its high tensile strength and Rockwell C37 hardness provide durability against shear and tensile stresses, while the hex drive allows for efficient installation with standard tools. These features collectively enhance operational reliability and reduce maintenance downtime in professional settings.
Specification Summary & Compliance
This screw features a 2-1/4" length with 8-32 coarse UNRC threads and a Class 3A thread fit for precise dimensional accuracy. It is manufactured in accordance with ASME B18.3 and ASTM A574 specifications, ensuring consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and use in global markets.
