S-91251A872 6-32 x 2 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.
- Superior corrosion resistance provided by the black-oxide finish on alloy steel, extending service life in demanding industrial environments.
- Precise Class 3A thread fit guarantees secure, vibration-resistant connections, minimizing loosening in critical assemblies.
- Partially threaded design allows for optimal clamping force on specific sections, enhancing joint stability and ease of installation.
- High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use.
- Standard hex drive (7/64") enables easy installation and removal with common tools, speeding up assembly processes.
- Compliance with ASTM A574, RoHS 3, and REACH ensures material quality and environmental safety for global supply chain requirements.
Professional Applications & Engineering Value
This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address common industrial challenges such as vibration-induced loosening and corrosion in machinery, automotive, and heavy equipment applications. The UNRC coarse thread with Class 3A fit provides superior holding power in metals and plastics, while the partially threaded configuration concentrates clamping force precisely where needed. Its 170,000 psi tensile strength and Rockwell C37 hardness ensure durability in high-load scenarios, making it ideal for securing components in assemblies that demand reliability and long-term performance without frequent maintenance.
Specification Summary & Compliance
This screw features a 6-32 thread size with coarse spacing and Class 3A thread fit for high precision. It meets ASTM A574 specifications for alloy steel socket head cap screws and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to international safety and environmental standards.
