S-97345A599 5/16"-18 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction, ideal for chemical processing and marine applications
• Enhanced assembly precision with Class 3A thread fit ensuring tight tolerances and reliable, vibration-resistant connections
• High mechanical strength delivering 70,000 psi tensile and 35,000 psi shear strength for demanding, heavy-duty industrial applications
• Secure, non-slip installation via the knurled socket head with hex drive, providing excellent grip and torque transmission
• Consistent dimensional accuracy with controlled shoulder diameter and length tolerances for precise component alignment
• Broad compliance and reliability meeting ASME B18.3, RoHS 3, and REACH standards for quality and environmental safety
• Optimized for coarse threading using 5/16"-18 UNC threads, facilitating quicker assembly and reduced cross-threading risks

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and structural assemblies where alignment and corrosion resistance are paramount. The Class 3A thread fit and controlled shoulder tolerances ensure minimal play and precise positioning of rotating parts, such as in bearings, pulleys, and linkages. Its coarse UNC threads enable rapid installation in high-volume production, while the knurled socket head design enhances torque application without slippage. With exceptional tensile and shear strength, it supports heavy loads and dynamic stresses in industrial equipment, reducing maintenance needs and downtime. Compliant with ASME B18.3 and environmental regulations, it offers a dependable solution for OEMs and MRO professionals in sectors like aerospace, automotive, and chemical processing.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit standards with UNC coarse threading (5/16"-18) and precise shoulder diameter tolerance (-0.004" to -0.002") and length tolerance (-0.005" to 0.005"). Manufactured in accordance with ASME B18.3 specifications, it ensures dimensional consistency and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industrial applications.