S-92865A541 1/4"-20 x 7/8" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 Steel Hex 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
- High tensile strength of 120,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure.
- Zinc plating provides excellent corrosion resistance, extending service life in harsh industrial environments.
- Grade 5 classification and Rockwell C25 hardness offer superior durability and consistent mechanical properties.
- Fully threaded design allows for maximum grip and holding power along the entire screw length.
- Coarse UNC threads enable quicker installation and better performance in softer materials or where vibration is a concern.
- Class 2A thread fit ensures easy assembly while maintaining secure fastening, improving installation efficiency.
- External hex drive provides high torque capability and familiar, tool-friendly installation for maintenance crews.
Professional Applications & Engineering Value
These Grade 5 hex head screws deliver exceptional engineering value across industrial applications where high tensile strength and corrosion resistance are critical. The zinc plated steel construction protects against environmental degradation in outdoor equipment, machinery assemblies, and structural frameworks. The 1/4"-20 UNC coarse thread configuration provides superior holding power in metal-to-metal applications and resists loosening under vibration, making them ideal for automotive components, construction equipment, and heavy machinery. The fully threaded design ensures maximum engagement in thick materials, while the external hex drive accommodates standard tools for efficient installation and maintenance in tight spaces.
Specification Summary & Compliance
This fastener maintains Class 2A thread fit per UNC standards, ensuring proper clearance for reliable assembly. Manufacturing complies with ASME B18.2.1 and SAE J429 Grade 5 specifications, guaranteeing dimensional accuracy and mechanical properties. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for industrial use.
