S-90281A106 5/16"-18 x 6" DIN 939 Setup Studs

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide steel coating, reducing maintenance needs and extending service life in harsh industrial environments.
• High tensile strength of 125,000 psi ensures reliable performance under heavy loads, minimizing the risk of mechanical failure.
• Precision Class 2A thread fit provides smooth assembly and secure fastening, reducing installation time and improving operational efficiency.
• Double-ended threading (1 1/8" on each end) allows for versatile connections and easy integration into complex setups, enhancing design flexibility.
• Rockwell C22 hardness rating offers excellent wear resistance, maintaining thread integrity through repeated use and high-stress conditions.
• Compliance with DIN 939 standards guarantees dimensional accuracy and interchangeability, ensuring compatibility with global industrial equipment.
• RoHS 3 and REACH environmental certifications support sustainable manufacturing practices and safe usage in regulated industries.

Professional Applications & Engineering Value

These black-oxide steel setup studs are engineered to address common challenges in precision assembly and machinery setup. The 5/16"-18 thread size and Class 2A thread fit ensure tight tolerances, reducing vibration-induced loosening in dynamic applications like CNC machining fixtures, automotive jigs, and industrial tooling. The threaded both ends design facilitates quick alignment and secure mounting, saving valuable time during production changes. With a minimum tensile strength of 125,000 psi and Rockwell C22 hardness, they withstand high mechanical stresses without deformation, making them ideal for repetitive disassembly and reassembly in maintenance-heavy environments. The DIN 939 compliance further assures consistent performance in European-standard equipment, while the corrosion-resistant black-oxide finish prolongs lifespan in humid or chemically exposed settings, delivering reliable engineering value across manufacturing, automation, and heavy machinery sectors.

Specification Summary & Compliance

This product adheres to Class 2A thread fit tolerances for inch-series threading, ensuring precise engagement and interchangeability. It meets DIN 939 specifications for dimensional accuracy and mechanical properties, including a defined thread length of 1 1/8" on both ends. The studs are manufactured from high-strength steel with a black-oxide surface treatment for enhanced durability. Compliance is verified with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances and supporting environmental safety in industrial applications.