S-97345A653 5/16"-18 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction for extended service life in harsh environments
• Precise component alignment through Class 3A thread fit and controlled shoulder tolerances for reduced assembly vibration
• High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Secure installation and removal with hex socket drive and knurled head for superior grip during torque application
• Reliable coarse threading with UNC 5/16"-18 configuration for faster assembly and reduced cross-threading risk
• Industry compliance assurance meeting ASME B18.3 specifications for consistent quality and interchangeability
• Environmental regulation compliance with RoHS 3 and REACH standards for global manufacturing applications

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw delivers exceptional engineering value in precision assembly applications where alignment accuracy and corrosion resistance are critical. The Class 3A thread fit ensures minimal play in high-vibration environments, while the precisely machined 1/2" shoulder diameter with tight tolerances provides reliable bearing surfaces for rotating components. The hex socket drive combined with the knurled head texture prevents tool slippage during high-torque installation, making it ideal for machinery, automation systems, and precision instruments. The coarse UNC threading facilitates rapid assembly in production environments, while the corrosion-resistant properties of 316 stainless steel ensure long-term reliability in chemical processing, marine, and food processing applications where environmental exposure is a concern.

Specification Summary & Compliance

This precision shoulder screw features 5/16"-18 UNC coarse threading with Class 3A fit for superior thread engagement. Critical dimensions include shoulder diameter of 1/2" with tolerance of -0.004" to -0.002" and shoulder length of 1/2" with tolerance of -0.005" to 0.005". The component meets ASME B18.3 manufacturing specifications and demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial applications requiring strict material and safety standards.