S-97345A201 1/4"-20 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and extended service life
• Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high-stress loads
• Precise assembly and alignment enabled by the Class 3A thread fit and standard shoulder, ensuring accurate component positioning
• Secure, non-slip installation thanks to the knurled socket head and 5/32" hex drive, reducing tool slippage and damage
• Optimized for quick assembly with UNC coarse threading (1/4"-20) and right-hand direction, speeding up production cycles
• Guaranteed dimensional consistency through adherence to ASME B18.3 standards, providing reliable interchangeability
• Safe for sensitive applications with compliance to RoHS 3 and REACH regulations, ensuring environmental and health safety

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and industrial equipment. Its UNC coarse thread (1/4"-20) and Class 3A thread fit deliver tight tolerances that prevent loosening under vibration, while the knurled socket head with a 5/32" hex drive ensures secure torque application without stripping. The robust 70,000 psi tensile strength and corrosion-resistant material make it ideal for applications in chemical processing, marine environments, and food machinery, where durability and hygiene are paramount. By integrating a standard shoulder for accurate alignment, it reduces wear on moving parts, enhancing overall system longevity and reducing maintenance costs.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC coarse thread with Class 3A precision fit for superior thread engagement. Dimensional accuracy is maintained with shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". Manufactured in compliance with ASME B18.3 standards, it ensures consistent quality and performance. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial use.