S-97832A367 3/8"-16 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments and reducing replacement frequency.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi minimum shear strength for reliable performance under high-stress applications.
• Precise alignment and secure positioning ensured by the 3" shoulder with tight diameter and length tolerances, minimizing component misalignment.
• Easy installation and removal with a 5/16" hex socket drive and knurled head, providing superior grip and torque transmission without slippage.
• Consistent and reliable thread engagement due to UNC coarse threading and Class 3A fit, ensuring vibration resistance and long-term fastening integrity.
• Compliance with rigorous industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing quality and environmental safety for global supply chains.
• Enhanced durability and wear resistance from Rockwell B55 hardness, maintaining structural integrity through repeated use and assembly cycles.

Professional Applications & Engineering Value

This shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial applications. The 18-8 Stainless Steel material provides excellent corrosion resistance, making it suitable for machinery exposed to moisture, chemicals, or outdoor conditions. The 3" shoulder length acts as a precise pivot or spacer, reducing wear on moving parts by preventing direct metal-to-metal contact. Combined with UNC coarse threading and a Class 3A thread fit, it ensures secure fastening in high-vibration environments like automotive assemblies, conveyor systems, and precision manufacturing equipment. The knurled head and hex socket drive facilitate quick installation with standard tools, enhancing assembly efficiency while maintaining torque accuracy. This design is ideal for applications requiring high tensile strength and dimensional stability, such as pivots, axles, and locating pins in heavy-duty machinery.

Specification Summary & Compliance

This shoulder screw features a 3/8"-16 UNC thread with Class 3A fit for precise thread engagement and tolerance control. The shoulder diameter is 5/8" with a tolerance of -0.004" to -0.002", and the shoulder length is 3" with a tolerance of -0.005" to 0.005", ensuring consistent dimensional accuracy. It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for use in regulated industries and international markets.