S-91251A230 3-48 x 7/8" 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 in demanding applications.
- Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life in harsh industrial environments without compromising structural integrity.
- Precise Class 3A thread fit guarantees tight, secure fastening with minimal backlash, ideal for assemblies requiring high vibration resistance.
- Optimized hex drive design with a 5/64" drive size allows for efficient installation using standard tools, reducing assembly time and labor costs.
- Coarse UNC threading enables quick engagement and disassembly, streamlining maintenance and repair operations in machinery and equipment.
- Partially threaded shank provides focused clamping force where needed, preventing loosening in dynamic load applications.
- Full compliance with ASTM A574, RoHS 3, and REACH ensures material consistency, environmental safety, and global regulatory acceptance for cross-border projects.
Professional Applications & Engineering Value
Engineered for high-stress industrial environments, these socket head cap screws leverage black-oxide alloy steel and UNC coarse threads to address common engineering challenges like vibration-induced loosening and corrosion. The Class 3A thread fit ensures precise alignment in precision machinery, automotive assemblies, and aerospace components, while the 170,000 psi tensile strength withstands extreme operational loads. Ideal for partially threaded fastening in equipment requiring targeted clamping, these screws reduce maintenance downtime and enhance structural reliability in industrial applications.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit for superior dimensional accuracy and UNC coarse thread spacing per inch standards. Manufactured under ASTM A574 specifications, it ensures consistent mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally safe and globally accepted usage.
