S-97832A181 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.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high stress.
• Precise component alignment ensured by the 3/4" shoulder length and 1/4" shoulder diameter, reducing assembly errors.
• High-accuracy Class 3A thread fit and 8-32 UNC coarse thread for secure, vibration-resistant fastening in demanding applications.
• Easy installation and removal with a hex socket drive and knurled head, providing superior grip and torque transmission.
• Compliance with major standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and environmental safety.
• Enhanced durability from Rockwell B55 hardness, resisting wear and deformation in repetitive use cycles.

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery, automation systems, and precision equipment. The 8-32 UNC coarse thread and Class 3A fit provide a secure, tight connection that resists loosening under vibration, while the 3/4" shoulder length acts as a precise spacer or pivot point, minimizing misalignment in assemblies. Made from corrosion-resistant stainless steel, it withstands exposure to moisture, chemicals, and high temperatures, reducing maintenance needs. The hex socket drive and knurled head facilitate easy installation in confined spaces, making it a reliable choice for applications requiring high tensile strength and long-term performance, such as in robotics, conveyor systems, and electronic enclosures.

Specification Summary & Compliance

This shoulder screw features precise dimensional tolerances, including a Class 3A thread fit for high accuracy, a shoulder diameter of 1/4" with a tolerance of -0.004" to -0.002", and a shoulder length of 3/4" with a tolerance of -0.005" to 0.005". It conforms to ASME B18.3 specifications for consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for industrial use.