S-91465A146 3/8"-16 x 2" 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 external square drive design for secure installation in high-vibration environments
- Reliable coarse thread engagement with UNC threading for faster assembly and reduced cross-threading risk
- Optimized strength-to-weight ratio with ASTM Grade A steel construction supporting 60,000 PSI tensile strength
- Controlled partial threading providing concentrated grip strength where needed while minimizing material usage
- Precision manufacturing to Unified Standard Class 2A thread fit ensuring consistent performance across applications
- Regulatory compliance assurance with RoHS 3 and ASTM A307 specifications meeting industrial safety standards
- Durable surface hardness rated Rockwell B69 for resistance to wear during repeated installations
Professional Applications & Engineering Value
This 3/8"-16 UNC square head screw delivers critical performance advantages in industrial fastening scenarios where vibration resistance and reliable torque application are paramount. The external square drive configuration prevents cam-out during high-torque installation, making it ideal for machinery assembly, structural steel connections, and heavy equipment maintenance. Manufactured from ASTM Grade A steel with Rockwell B69 hardness, the fastener maintains structural integrity under sustained loads while the coarse thread pitch ensures rapid installation in wood, metal, and composite materials. The partially threaded design concentrates clamping force at critical joint locations, preventing loosening in dynamic operating conditions common in construction, manufacturing, and transportation equipment applications.
Specification Summary & Compliance
This square head screw features Unified Standard Class 2A thread tolerances with 3/8"-16 UNC coarse threading and 1" minimum thread length on a 2" overall fastener. Manufactured to ASTM A307 specifications with 60,000 PSI tensile strength rating and compliant with RoHS 3 (2015/863/EU) environmental regulations. The inch-system fastener meets industrial standards for low-strength applications where controlled clamping force is required without compromising joint integrity.
