S-93712A200 5/16"-24 x 3" Partially Threaded Studs with Cotter Pin

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
• Secure locking mechanism provided by the included 3" hairpin cotter pin, preventing accidental loosening under vibration.
• Precise thread engagement with a Class 2A fit and UNF fine threading, ensuring reliable, tight connections in critical assemblies.
• Enhanced durability from Rockwell B89 hardness, offering excellent resistance to wear and deformation.
• Optimized for efficient assembly with a 2" threaded length and 1" unthreaded shaft, providing flexibility for various mounting applications.
• Strict dimensional control with a shaft diameter tolerance of -0.005" to 0.005", guaranteeing consistent performance and ease of installation.
• Compliance with global standards including RoHS 3 and REACH, ensuring safety and environmental responsibility for international supply chains.

Professional Applications & Engineering Value

This partially threaded stud with cotter pin is engineered to solve critical fastening challenges in industrial and mechanical systems. The 18-8 Stainless Steel material provides excellent resistance to rust and corrosion, making it suitable for applications in marine, chemical processing, and outdoor equipment. The 5/16"-24 UNF fine thread and Class 2A fit deliver high clamping force and vibration resistance, essential for machinery, automotive components, and structural assemblies where loosening could lead to failure. The integrated hairpin cotter pin offers a quick, reliable locking solution, eliminating the need for additional fasteners and reducing maintenance downtime. This design is ideal for pivoting joints, axle retainers, and other dynamic connections that require both strength and security.

Specification Summary & Compliance

The stud features a 5/16" shaft diameter with a tight tolerance of -0.005" to 0.005", right-hand UNF fine threading per applicable standards, and a Class 2A thread fit for consistent interchangeability. It is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety requirements for industrial fasteners.