S-97832A315 1/4"-20 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
• Precise component alignment and reduced wear thanks to the Class 3A thread fit and standard shoulder fit, ensuring consistent performance.
• High mechanical strength with 70,000 psi tensile strength and 35,000 psi minimum shear strength, providing dependable load-bearing capacity.
• Secure and efficient installation using the 5/32" hex socket drive and knurled head, which prevents slipping and allows for high torque application.
• Accurate pivoting and spacing due to the 1 7/8" shoulder length with tight tolerances, maintaining part positioning in assemblies.
• Broad compatibility and reliability with UNC coarse threads and compliance to ASME B18.3 standards, ensuring interchangeability and quality.
• Environmental and safety compliance with RoHS 3 and REACH standards, making it suitable for regulated industries.

Professional Applications & Engineering Value

This 1/4"-20 UNC shoulder screw is engineered to address critical challenges in mechanical assemblies, such as misalignment and component wear. Made from 18-8 Stainless Steel, it offers excellent corrosion resistance, which is vital in moist or chemical-exposed settings like manufacturing equipment and automotive systems. The Class 3A thread fit and precise shoulder dimensions ensure minimal backlash and reliable alignment in rotating parts, reducing maintenance needs. With a hex socket drive and knurled head, it allows for secure tightening in confined spaces, enhancing assembly efficiency. Ideal for use in pivots, spacers, and guides, this screw supports high-stress applications while meeting stringent industry standards for performance and safety.

Specification Summary & Compliance

The screw features a 1/4"-20 UNC coarse thread with Class 3A fit for high precision, along with a shoulder diameter of 5/16" and length of 1 7/8" with tight tolerances (e.g., shoulder diameter tolerance of -0.004" to -0.002"). It is manufactured in accordance with ASME B18.3 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and quality for industrial use.