S-97832A148 5/16"-18 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life.
• Precise component alignment ensured by the 1-1/4" shoulder with tight diameter tolerance, reducing assembly errors and wear.
• High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance in demanding applications.
• Secure and easy installation with a 1/4" hex socket drive and knurled head, providing excellent grip and torque transmission.
• Consistent thread engagement due to Class 3A UNC coarse threads, enabling quick assembly and high vibration resistance.
• Compliance with major standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and environmental safety.
• Durable and wear-resistant with Rockwell B55 hardness, maintaining integrity under repeated use and stress.

Professional Applications & Engineering Value

This stainless steel shoulder screw is engineered to address critical alignment and load-bearing challenges in precision assemblies. The 5/16"-18 UNC coarse thread and 1-1/4" shoulder length provide stable pivoting and spacing in machinery, such as conveyor systems, robotic arms, and automotive fixtures, where misalignment can cause operational failures. Made from 18-8 stainless steel, it resists rust and corrosion in humid or chemical-exposed settings, reducing maintenance costs. The knurled head and hex socket drive allow for secure tightening without slippage, enhancing assembly efficiency. Ideal for industrial shoulder bolt applications, this component ensures long-term reliability and performance in high-stress environments, supporting seamless production workflows.

Specification Summary & Compliance

This shoulder screw adheres to precise dimensional standards, including a Class 3A thread fit for superior thread engagement and a shoulder diameter tolerance of -0.004" to -0.002". It meets ASME B18.3 specifications for consistency and safety, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances for environmentally responsible use in global markets.