S-91465A227 5/8"-11 x 5" 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
- Superior torque transmission with external square drive design for reliable installation in high-torque applications
- Excellent durability with ASTM Grade A steel construction providing consistent performance in demanding environments
- Optimized thread engagement through UNC coarse threading that resists vibration loosening and simplifies alignment
- Precise fit and compatibility with Class 2A unified standard ensuring consistent performance across industrial applications
- Enhanced material integrity with 60,000 PSI tensile strength and Rockwell B69 hardness for reliable load-bearing capacity
- Versatile partial threading allowing for both secure fastening and adjustable positioning in assembly operations
- Environmental compliance assurance with RoHS 3 certification for use in regulated industrial sectors
Professional Applications & Engineering Value
This 5/8"-11 UNC square head screw delivers exceptional engineering value through its ASTM Grade A steel composition and coarse thread design, specifically engineered to address common industrial fastening challenges. The external square drive provides superior torque transmission during installation, reducing the risk of tool slippage in high-tension applications. The partially threaded configuration with 1-1/2" minimum thread length offers optimal stress distribution while allowing for adjustment flexibility in construction, machinery assembly, and structural applications. With its 60,000 PSI tensile strength and standardized Class 2A thread fit, this fastener ensures reliable performance in vibration-prone environments where maintaining joint integrity is critical for operational safety and equipment longevity.
Specification Summary & Compliance
This square head screw features 5/8"-11 UNC coarse threads with Class 2A unified standard dimensional accuracy and a 5" overall length. Manufactured from ASTM Grade A steel with Rockwell B69 hardness and 60,000 PSI tensile strength, it complies with ASTM A307 specifications for low-strength applications. The fastener is RoHS 3 (2015/863/EU) compliant and meets industrial standards for inch-system fasteners with right-hand threading and partial threading configuration.
