S-97832A176 8-32 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 extended service life.
• Precise component alignment ensured by the 3/8" shoulder length and standard shoulder fit, reducing assembly errors and improving mechanical stability.
• High-strength performance delivering 70,000 psi tensile and 35,000 psi shear strength for demanding applications requiring reliable load-bearing capacity.
• Secure and repeatable fastening with Class 3A thread fit and UNC coarse threads, providing excellent vibration resistance and ease of installation.
• Enhanced grip and tool engagement from the knurled socket head and hex drive, allowing for efficient torque application and reduced slippage during assembly.
• Long-term durability supported by Rockwell B55 hardness, maintaining structural integrity under repetitive stress and mechanical wear.
• Regulatory compliance and quality assurance meeting ASME B18.3 standards, RoHS 3, and REACH, ensuring safe and environmentally responsible use in global markets.

Professional Applications & Engineering Value

This 8-32 UNC shoulder screw is engineered to address critical alignment and strength challenges in precision assemblies. The 18-8 stainless steel material offers excellent resistance to corrosion and oxidation, making it suitable for applications in machinery, automotive, and electronics where environmental factors are a concern. The 3/8" shoulder length and precise Class 3A thread fit ensure accurate positioning of components like gears, pulleys, and bearings, minimizing misalignment and reducing wear. With a coarse UNC thread and knurled socket head, it facilitates quick installation and secure fastening in high-vibration settings, enhancing operational reliability. Ideal for use in industrial fasteners and mechanical systems, this screw provides consistent performance where high tensile strength and dimensional accuracy are paramount.

Specification Summary & Compliance

This shoulder screw features precise dimensional tolerances, including a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005", ensuring consistent fit and function. It adheres to UNC thread standards with a Class 3A fit for superior thread engagement and is manufactured in compliance with ASME B18.3 specifications. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for industrial use.