S-97832A193 4-40 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 with 70,000 psi tensile strength and Rockwell B55 hardness, ensuring reliable performance under high-stress conditions.
• Precise and secure fastening due to Class 3A thread fit and UNC coarse thread, minimizing the risk of loosening in vibrating applications.
• Easy installation and removal with a 5/64" hex socket drive and knurled head, providing excellent grip and torque transmission.
• Accurate alignment and spacing enabled by the 2" precision shoulder with controlled diameter and length tolerances.
• Compliance with strict environmental regulations, being RoHS 3 and REACH compliant for use in regulated markets.
• Versatile right-hand thread design for standard assembly processes across various machinery and equipment.

Professional Applications & Engineering Value

This 18-8 Stainless Steel shoulder screw is engineered to address critical challenges in precision assembly and motion control systems. The 2" shoulder acts as a precise pivot, spacer, or axle, eliminating misalignment in rotating parts like gears, bearings, and linkages. Its Class 3A UNC thread ensures a tight, secure fit that resists vibration-induced loosening, a common failure point in industrial machinery. The corrosion-resistant material and high tensile strength make it suitable for demanding applications in automation, aerospace, and medical devices, where reliability and durability are non-negotiable. The knurled head and hex socket drive facilitate quick, tool-friendly installation, reducing assembly time and improving maintenance efficiency in B2B production environments.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for high precision. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring consistent dimensional accuracy. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming its suitability for environmentally conscious industrial applications without hazardous substances.