S-97345A867 5/8"-11 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial and marine environments
• High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength for demanding mechanical applications
• Precision alignment and reduced wear thanks to the 2 1/2" shoulder with tight diameter tolerance for stable component positioning
• Reliable thread engagement with Class 3A fit and coarse UNC threads ensuring secure fastening in high-vibration settings
• Easy installation and removal using the 3/8" hex drive and knurled head for improved grip with standard tools
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality assurance and environmental safety
• Durable Rockwell B79 hardness providing excellent wear resistance and long service life in repetitive assembly operations

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. The 5/8"-11 UNC coarse thread with Class 3A fit ensures rapid assembly and reliable retention under dynamic loads, while the extended 2 1/2" shoulder provides accurate alignment for rotating components like bearings and pulleys, minimizing misalignment and eccentric wear. The socket head with hex drive allows for compact installation in confined spaces, and the knurled texture enhances handling during manual adjustments. Ideal for industrial applications requiring corrosion resistance and high tensile strength, this fastener delivers consistent performance in manufacturing, automotive, and marine environments where durability and precision are paramount.

Specification Summary & Compliance

This shoulder screw maintains precise dimensional tolerances, including a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005", ensuring consistent fit in precision assemblies. Thread specifications adhere to UNC coarse thread standards with Class 3A thread fit for superior engagement. The product conforms to ASME B18.3 manufacturing specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, guaranteeing safe use in regulated industries.