S-97345A206 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 industrial environments and chemical exposure.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high-stress conditions.
• Precise Class 3A thread fit ensures tight tolerances and secure fastening, reducing the risk of loosening in vibrating applications.
• Secure and efficient installation with a knurled socket head and 5/32" hex drive, providing excellent grip and torque transmission.
• Durable shoulder design with controlled diameter and length tolerances for accurate alignment and bearing surfaces in assemblies.
• Compliance with industry standards including ASME B18.3, ensuring consistent quality and interchangeability in professional applications.
• Environmental and safety compliance with RoHS 3 and REACH regulations, making it suitable for global industrial and electronic uses.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. Its 1/4"-20 UNC coarse threads with Class 3A fit provide superior holding power and vibration resistance, minimizing maintenance needs in dynamic environments. The knurled socket head and hex drive facilitate quick, secure installation, reducing assembly time and tool slippage. Made from high-grade 316 stainless steel, it offers excellent resistance to corrosion and oxidation, extending service life in demanding sectors like aerospace, marine, and chemical processing. The precise shoulder diameter and length ensure accurate component alignment, enhancing overall system reliability and reducing wear on moving parts.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC thread with Class 3A fit for high precision, and complies with ASME B18.3 specifications. Key dimensions include a shoulder diameter of 5/16" with a tolerance of -0.004" to -0.002", and shoulder length of 7/8" with a tolerance of -0.005" to 0.005". It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for various industrial applications.