S-97768A364 5/16"-18 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel and black oxide finish for long-lasting performance in harsh environments
• High mechanical strength delivering 70,000 psi tensile and 35,000 psi shear strength for demanding industrial applications
• Precise Class 3A thread fit ensuring reliable engagement and vibration resistance in assembly operations
• Knurled socket head design providing superior grip and slip resistance during installation with hex drive
• Accurate shoulder dimensions with tight tolerances for consistent alignment and bearing surfaces in machinery
• Compliance with major standards including ASME B18.3, RoHS 3, and REACH for guaranteed quality and safety
• Durable Rockwell B55 hardness maintaining structural integrity under repeated loads and wear

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw with black oxide finish is engineered to address critical alignment and corrosion challenges in industrial equipment. The 5/16"-18 UNC coarse thread and Class 3A fit provide secure fastening in high-vibration environments like robotics, conveyor systems, and precision machinery. The 3/8" shoulder diameter and 7/8" shoulder length act as precise pivot points or spacers, reducing wear on moving parts. With 70,000 psi tensile strength and corrosion-resistant properties, it eliminates premature failure in automotive, aerospace, and manufacturing assemblies, ensuring extended service life and reduced maintenance costs.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit and precise shoulder tolerances (diameter: -0.004" to -0.002", length: -0.005" to 0.005"). Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability for global industrial supply chains.