S-96126A124 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh environments and extended service life.
• Precise component alignment ensured by a smooth, accurately machined 1/8" diameter shoulder with tight tolerances for reliable positioning.
• High-strength performance offering 70,000 psi tensile strength and Rockwell B79 hardness for demanding mechanical applications.
• Secure and efficient installation via a standard hex socket drive (5/64"), providing a reliable, cam-out resistant connection.
• Wide compatibility with 4-40 UNC coarse threads and Class 2A fit, ensuring easy assembly and interchangeability in standard systems.
• Environmental and regulatory compliance meeting RoHS 3 and REACH standards for safe use in regulated industries.
• Optimized for smooth operation with a right-hand thread and smooth head texture, reducing friction and wear in dynamic assemblies.

Professional Applications & Engineering Value

This 316 Stainless Steel Shoulder Screw is engineered to address critical challenges in precision machinery and industrial equipment. The passivated finish enhances its resistance to corrosive agents, making it suitable for applications in chemical processing, marine environments, and medical devices where durability is paramount. The 1/8" shoulder diameter with precise tolerances provides a stable pivot or locating point, eliminating misalignment in assemblies such as gears, linkages, and rotating components. With a 70000 psi tensile strength and UNC coarse threads, it ensures robust fastening under high stress while facilitating quick assembly. The socket head design allows for compact installation in confined spaces, offering reliable performance in automation systems, precision instruments, and other demanding industrial applications that require consistent, long-term operation.

Specification Summary & Compliance

This shoulder screw adheres to Class 2A thread fit and UNC standards for consistent dimensional accuracy. Key specifications include a shoulder diameter of 1/8" with a tolerance of -0.001" to 0", shoulder length of 1/4" (tolerance 0" to 0.002"), and coarse thread spacing. It is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met for global industrial use.