S-91465A155 3/8"-16 x 3 1/2" 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 application with external square drive design for secure installation and removal in high-stress environments
- Superior material durability through ASTM A307 Grade A steel construction, ensuring reliable performance in demanding applications
- Optimized thread engagement with Unified Standard Class 2A coarse UNC threads providing consistent fastening and vibration resistance
- Significant strength retention with 60,000 psi tensile strength and Rockwell B69 hardness for long-term structural integrity
- Versatile partial threading allowing precise clamping force control across various material thicknesses
- Regulatory compliance assurance with RoHS 3 (2015/863/EU) certification for safe use in regulated industries
- Industrial-grade dimensions featuring 3½" length and 3/8"-16 thread size for heavy-duty assembly requirements
Professional Applications & Engineering Value
This 3/8"-16 UNC square head screw delivers exceptional engineering value through its ASTM A307 Grade A steel composition and coarse thread configuration. The external square drive enables high-torque installation without cam-out, solving common assembly challenges in construction and heavy machinery. The partially threaded design provides optimal stress distribution while the Unified Standard Class 2A thread fit ensures precise engagement in structural applications. With 60,000 psi tensile strength and Rockwell B69 hardness, this fastener maintains integrity under dynamic loads, making it ideal for industrial equipment, structural steel connections, and machinery assembly where reliability is critical.
Specification Summary & Compliance
This square head screw maintains precise Unified Standard Class 2A thread fit with 3/8"-16 UNC coarse threading and 1" minimum thread length. Manufactured to ASTM A307 specifications with dimensional accuracy including 3½" length and 9/16" head width. Fully compliant with RoHS 3 (2015/863/EU) regulations for restricted substance control, ensuring environmental responsibility in industrial applications.
