S-91465A272 3/4"-10 x 9" 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
- Enhanced torque transmission through the external square drive design, preventing tool slippage during high-torque installation
- Superior corrosion resistance and durability with ASTM Grade A steel construction, ideal for harsh industrial environments
- Reliable coarse UNC threading ensures faster installation and better performance in softer materials or where debris is present
- Consistent thread engagement with Unified Standard Class 2A fit, providing predictable clamping force and assembly reliability
- Robust mechanical performance backed by 60,000 psi tensile strength and Rockwell B69 hardness for demanding applications
- Environmental compliance assurance with RoHS 3 compliance, meeting strict international regulatory standards
- Optimized partial threading with 2" minimum thread length allows for focused thread engagement where needed
Professional Applications & Engineering Value
This 3/4"-10 UNC square head screw delivers critical engineering value in heavy machinery, structural connections, and construction applications where vibration resistance and high tensile strength are paramount. The ASTM A307 Grade A steel composition provides excellent durability against mechanical stress, while the coarse thread design prevents cross-threading and ensures reliable performance in wood, structural steel, and cast iron assemblies. The partially threaded configuration concentrates shear strength in the shank while providing sufficient thread engagement. With its external square drive and right-hand thread orientation, this fastener enables efficient installation using standard industrial tools, significantly reducing assembly time in maintenance and manufacturing operations.
Specification Summary & Compliance
This square head screw features precision Unified Standard Class 2A thread fit with 3/4"-10 UNC coarse thread specifications, ensuring dimensional accuracy across industrial applications. Manufactured to ASTM A307 standards with 60,000 psi tensile strength and Rockwell B69 hardness verification. The fastener maintains RoHS 3 (2015/863/EU) compliance for environmental safety and is supplied in the inch system with critical dimensions including 9" length, 1 1/8" head width, and 1/2" head height.
