S-97345A426 8-32 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction for long-lasting performance in harsh environments
• Precise component alignment through Class 3A thread fit and controlled shoulder diameter tolerances
• High mechanical strength with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications
• Secure installation and removal with knurled socket head and 1/8" hex drive preventing tool slippage
• Reliable coarse threading with 8-32 UNC right-hand threads ensuring quick assembly and vibration resistance
• Extended bearing surface with 1-1/2" shoulder length providing stable support for rotating components
• Industry compliance assurance meeting ASME B18.3 standards and environmental regulations for global use

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw delivers exceptional engineering value in precision machinery and industrial equipment. The Class 3A thread fit ensures tight tolerances for accurate component positioning, while the 1-1/2" shoulder length provides substantial bearing surface for rotating parts like gears, pulleys, and linkages. The coarse 8-32 UNC threads facilitate rapid assembly and maintain grip under vibration, making these socket head shoulder screws ideal for manufacturing automation, conveyor systems, and precision instruments. The knurled head texture combined with hex drive allows for secure tool engagement during installation, preventing damage to critical assembly components. These features collectively address common industrial challenges of misalignment, corrosion, and mechanical failure in demanding environments.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit precision and shoulder diameter tolerance of -0.004" to -0.002". The shoulder length maintains tight control at -0.005" to 0.005" tolerance. This shoulder screw conforms to ASME B18.3 specifications and demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Mechanical properties include Rockwell B79 hardness and UNC coarse threading system, ensuring reliable performance in industrial applications requiring precise dimensional stability and corrosion resistance.