S-91251A046 3/4"-16 x 2 1/2" 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 extends service life in demanding industrial environments.
- Precision Class 3A UNRF fine threads provide a secure, tight fit with minimal play, enhancing assembly accuracy and vibration resistance.
- High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use.
- Fully threaded design allows for uniform load distribution and maximum grip along the entire length.
- Hex socket drive (5/8") enables easy installation and removal with standard tools, even in confined spaces.
- Compliance with RoHS 3 and REACH ensures environmental safety and regulatory acceptance for global industrial applications.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in heavy-duty machinery, automotive, and aerospace assemblies where high tensile strength and corrosion resistance are paramount. The Class 3A UNRF fine threads deliver precise engagement, minimizing loosening under vibration and ensuring consistent clamping force. With a Rockwell C37 hardness and fully threaded construction, it withstands repetitive stress and harsh conditions, reducing maintenance downtime. Ideal for applications requiring reliable fastening in corrosive or high-load environments, this screw meets ASTM A574 specifications for dependable performance in industrial settings.
Specification Summary & Compliance
This product features a 3/4"-16 UNRF fine thread with Class 3A fit for high precision and strength. It complies with ASTM A574 standards and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring adherence to environmental and safety regulations. Dimensions include a 2 1/2" length, 1 1/8" head diameter, and 5/8" hex drive for consistent performance in industrial applications.
