S-97345A618 5/16"-18 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction for reliable performance in harsh industrial environments
• Precise component alignment through controlled shoulder diameter tolerances (-0.004" to -0.002") ensuring consistent assembly fit
• High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Secure installation and removal with knurled socket head design providing enhanced grip during hex drive operation
• Reliable thread engagement through Class 3A thread fit and UNC coarse threading for vibration resistance
• Industry-standard compatibility meeting ASME B18.3 specifications for interchangeability and quality assurance
• Environmental compliance with RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw delivers exceptional engineering value in precision assembly applications where alignment and corrosion resistance are critical. The Class 3A thread fit ensures tight tolerances for vibration-resistant connections in machinery, automation systems, and precision equipment. The knurled socket head with hex drive provides superior torque transmission while preventing tool slippage during installation. The precisely controlled shoulder diameter serves as a reliable locating surface for rotating components, bearings, and linkages, eliminating the need for additional spacing elements. Manufactured to ASME B18.3 standards, these UNC coarse thread shoulder screws maintain dimensional consistency across industrial applications while the right-hand thread direction ensures compatibility with standard assembly practices.

Specification Summary & Compliance

This precision shoulder screw features Class 3A thread fit with UNC coarse threading (5/16"-18) and maintains tight shoulder diameter tolerance (-0.004" to -0.002") for precise component alignment. Manufactured in compliance with ASME B18.3 specifications for dimensional consistency and performance reliability. The product meets RoHS 3 (2015/863/EU) compliance for restricted substance control and REACH (EC 1907/2006) standards for chemical safety, ensuring suitability for regulated industrial environments and international market requirements.