S-97345A154 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 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, high-stress fastening applications.
• Precise Class 3A thread fit ensures consistent engagement and vibration resistance in assembled components.
• Easy installation and removal with a 5/64" hex socket drive and knurled head for improved grip and torque application.
• Accurate shoulder positioning with a 1/8" diameter and 9/16" length, providing stable alignment for moving parts.
• Compliance with environmental regulations, including RoHS 3 and REACH, for safe use in global markets.
• Durable performance backed by Rockwell B79 hardness, resisting wear and deformation under load.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, such as misalignment and component wear. Its 4-40 UNC coarse thread and Class 3A fit provide secure fastening in applications like rotating assemblies, pivots, and guides, where high tensile strength (70,000 psi) and corrosion resistance are essential. The knurled head and hex socket drive facilitate quick maintenance, while the precisely machined shoulder ensures accurate spacing and reduces friction in industrial equipment, enhancing overall reliability and reducing downtime.

Specification Summary & Compliance

The screw features a Class 3A thread fit per UNC standards, with shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005" for consistent performance. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for demanding industrial applications.