S-91309A849 3/4"-10 x 3 1/2" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws
Low-Strength 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
- Superior corrosion resistance with zinc plating, extending service life in harsh industrial environments
- Exceptional tensile strength of 60,000 PSI for reliable performance in heavy-duty applications
- Precise Class 2A thread fit ensures smooth installation and secure fastening connections
- Coarse UNC threading provides excellent grip and vibration resistance in various materials
- Full threading design allows for maximum engagement depth and load distribution
- External hex drive enables high-torque installation with standard tools for efficient assembly
- Rockwell B69 hardness maintains structural integrity under repeated stress and load conditions
Professional Applications & Engineering Value
This 3/4"-10 hex head screw delivers critical engineering solutions for industrial applications requiring robust fastening performance. The high-strength steel construction combined with zinc plating addresses common challenges of structural integrity and environmental corrosion in manufacturing, construction, and heavy equipment assembly. The coarse UNC thread design prevents cross-threading and provides superior holding power in wood, metal, and composite materials, while the external hex drive accommodates high-torque applications without stripping. Engineered to withstand extreme mechanical stress, these fully threaded screws ensure uniform load distribution across the entire fastener length, making them ideal for structural connections, machinery assembly, and infrastructure projects where vibration resistance and long-term reliability are paramount.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit with 3/4"-10 UNC coarse thread specifications and 3 1/2" length dimensions. Manufactured in compliance with ASME B18.2.1 standards and ASTM A307 material specifications, ensuring consistent quality and performance. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, providing assurance for industrial applications requiring regulatory compliance and environmental responsibility.
