S-95235A540 5/16"-18 x 5/16" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Permanent vibration resistance with nylon patch thread locker that maintains secure fastening even under dynamic loads
• Superior thread engagement thanks to Class 3A external thread fit ensuring precise, reliable connections in demanding applications
• Exceptional durability from alloy steel construction with Rockwell C45 hardness for long-term performance in harsh environments
• High-temperature stability with thread locker that remains effective up to 250°F (121°C) without performance degradation
• Easy installation and removal using standard 5/32" hex drive tools for efficient maintenance and assembly operations
• Enhanced grip and positioning through extended tip design that provides superior holding power in shaft collars and couplings
• Industry compliance assurance meeting ASME B18.3 specifications and environmental regulations for global manufacturing applications

Professional Applications & Engineering Value

This 5/16"-18 UNC hex headless set screw delivers critical engineering solutions for industrial applications where vibration resistance and permanent positioning are paramount. The alloy steel construction with Rockwell C45 hardness provides exceptional shear strength and wear resistance, making it ideal for securing pulleys, gears, and collars on rotating shafts in machinery and power transmission systems. The nylon patch thread locking technology eliminates the need for additional locking components while providing reliable vibration resistance in automotive, aerospace, and heavy equipment applications. The coarse UNC thread pattern ensures quick assembly and disassembly while the extended tip design maximizes surface contact for superior holding torque. Engineered to withstand demanding industrial environments, this set screw maintains its locking performance across temperature variations up to 250°F, ensuring long-term reliability in manufacturing equipment, conveyor systems, and precision machinery where secure fastening is critical to operational safety and efficiency.

Specification Summary & Compliance

This high-performance set screw features precision 5/16"-18 UNC coarse threads with Class 3A external thread fit for superior dimensional accuracy and engagement. Manufactured in compliance with ASME B18.3 specifications (ASTM F912) to ensure consistent quality and performance. The component meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards, making it suitable for global industrial applications. The extended tip configuration maintains tight tolerances with tip diameter of 0.203" (-0.008" to 0") and tip length of 0.082" (-0.008" to 0") for precise positioning and maximum holding power in critical assemblies.