S-97345A312 5-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction for long-lasting performance in harsh industrial environments.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength to withstand high-stress applications.
• Precise Class 3A thread fit ensures reliable, secure fastening with minimal backlash in precision assemblies.
• Enhanced grip and torque application from the knurled socket head and 3/32" hex drive, reducing tool slippage.
• Versatile shoulder design with a 3/8" length and controlled diameter tolerance for accurate component alignment and spacing.
• Durable Rockwell B79 hardness provides excellent wear resistance, extending the screw's service life.
• Compliance with RoHS 3 and REACH ensures environmental safety and suitability for regulated industries.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation, and assembly systems. The 5-40 UNC coarse thread with Class 3A fit delivers secure, repeatable fastening, minimizing the risk of loosening under vibration. The knurled socket head enhances torque transmission, while the precisely machined shoulder provides stable alignment for rotating parts like gears and pulleys. Its high tensile strength and corrosion resistance make it ideal for demanding environments, including marine, chemical processing, and food equipment, ensuring reliability and reducing maintenance needs.

Specification Summary & Compliance

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