S-91465A233 5/8"-11 x 7" ASTM A307 Square Head Screws
Square 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 torque capability with external square drive design for secure installation and removal in demanding industrial environments
- Reliable mechanical performance with 60,000 psi tensile strength and Rockwell B69 hardness for consistent load-bearing capacity
- Optimized thread engagement through UNC coarse threading and Class 2A fit ensuring vibration resistance and easier assembly
- Versatile partial threading with 1 3/4" minimum thread length providing flexibility for various material thicknesses
- Industry-standard compliance with ASTM A307 Grade A specifications guaranteeing material quality and performance consistency
- Environmental responsibility with RoHS 3 compliance meeting international regulatory requirements for hazardous substances
- Durable steel construction offering excellent corrosion resistance and long-term service life in industrial applications
Professional Applications & Engineering Value
This 5/8"-11 UNC square head screw delivers exceptional engineering value through its ASTM A307 Grade A steel construction and coarse thread design. The partially threaded configuration with 1 3/4" minimum thread length provides optimal clamping force distribution, preventing joint loosening in high-vibration environments common in machinery assembly, structural steel connections, and heavy equipment manufacturing. The external square drive enables high-torque application without cam-out issues, while the Unified Standard Class 2A thread fit ensures precise engagement with mating components. These features make it ideal for construction, manufacturing, and maintenance applications where reliable fastening performance and ease of installation are critical operational requirements.
Specification Summary & Compliance
This square head screw features 5/8"-11 UNC coarse threads with Unified Standard Class 2A dimensional accuracy and partial threading configuration. Manufactured from ASTM A307 Grade A steel with 60,000 psi tensile strength and Rockwell B69 hardness, the fastener complies with RoHS 3 (2015/863/EU) environmental regulations and meets all ASTM A307 specification requirements for material composition and mechanical properties.
