S-97345A940 1/2"-13 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments including chemical and marine applications.
• Exceptional tensile strength of 70,000 psi ensures reliable performance under high-stress conditions, reducing failure risks.
• Precise Class 3A thread fit provides tight, secure fastening with minimal backlash in critical assemblies.
• Knurled head design offers enhanced grip for easy manual adjustment and installation without slipping.
• Long 2 1/2" shoulder length allows for accurate component spacing and alignment in machinery and equipment.
• Compliance with ASME B18.3 standards guarantees consistent quality and interchangeability for industrial use.
• RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence in global markets.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical stress. The 1/2"-13 UNC coarse thread and Class 3A fit provide rapid assembly and vibration resistance, making it ideal for heavy-duty machinery, automation systems, and precision equipment. The knurled head enhances handling in tight spaces, while the 2 1/2" shoulder ensures stable bearing surfaces for rotating parts. With high tensile and shear strength, it reduces maintenance needs and extends service life in demanding applications like manufacturing, marine, and chemical processing.

Specification Summary & Compliance

This shoulder screw features a 1/2"-13 UNC thread with Class 3A fit for precise tolerance, a shoulder diameter of 3/4" with tolerance of -0.004" to -0.002", and shoulder length of 2 1/2" with tolerance of -0.005" to 0.005". It meets ASME B18.3 specifications for dimensional consistency and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards.