S-91418A851 3/4"-10 x 4" ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Maximum torque transmission through the square head design, preventing tool slippage during high-stress installations
• Superior corrosion resistance with black-oxide coating on alloy steel, extending service life in harsh industrial environments
• Enhanced holding power from the extended tip design, providing deeper penetration and secure component locking
• Consistent thread engagement with Class 2A thread fit, ensuring reliable fastening performance across applications
• Exceptional durability from Rockwell C45 hardness, maintaining structural integrity under heavy loads
• Quick installation with coarse UNC threads, reducing assembly time in production environments
• Regulatory compliance meeting ASTM F912, RoHS 3, and REACH standards for global industrial use

Professional Applications & Engineering Value

This 3/4"-10 UNC square head set screw delivers critical engineering solutions for heavy-duty industrial applications where vibration resistance and permanent positioning are paramount. The black-oxide alloy steel construction provides superior corrosion protection while maintaining the Rockwell C45 hardness needed for high-strength requirements. The extended tip design ensures deeper material penetration, preventing component slippage in machinery, conveyor systems, and power transmission equipment. With its coarse thread spacing and external square drive, installation becomes significantly faster while allowing for higher torque application compared to standard fasteners. This combination of features makes it ideal for permanent assembly applications in manufacturing, automotive, and heavy equipment industries where reliability cannot be compromised.

Specification Summary & Compliance

This set screw maintains precise Class 2A thread fit tolerances with 3/4"-10 UNC coarse threads and right-hand thread direction. The extended tip features controlled dimensions with tip length tolerance of -0.005" to 0.005" and tip diameter tolerance of -0.013" to 0". Manufacturing complies with ASTM F912 specifications for set screws, along with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial applications.