S-90318A570 2-56 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction for extended service life in harsh chemical and marine environments
• Precise component alignment with accurately machined 5/16" shoulder maintaining tight tolerances for reliable assembly fit
• High-strength performance delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding mechanical applications
• Optimized thread engagement with Class 2A UNC coarse threads ensuring secure fastening while resisting vibration loosening
• Space-saving low-profile design featuring ultra-low socket head for applications with limited clearance requirements
• Consistent installation torque with smooth hex socket drive providing reliable, slip-free engagement during assembly
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use across global industrial markets

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw delivers exceptional engineering value in precision applications where component alignment and corrosion resistance are critical. The precisely machined 5/16" shoulder length with tight diameter tolerance ensures accurate positioning of moving parts in assemblies, while the 2-56 UNC coarse thread provides reliable fastening in vibration-prone environments. The ultra-low socket head profile with 5/64" hex drive enables installation in confined spaces common in machinery, automation systems, and electronic enclosures. With Rockwell B70 hardness and 70,000 psi tensile strength, this fastener maintains structural integrity under mechanical stress, making it ideal for precision instruments, rotating assemblies, and industrial equipment requiring durable, corrosion-resistant shoulder screw solutions.

Specification Summary & Compliance

This precision shoulder screw features Class 2A thread fit per UNC standards with 1/8" thread length and 5/16" shoulder length maintaining precise dimensional tolerances. Manufactured from 316 stainless steel with Rockwell B70 hardness, it delivers 70,000 psi tensile strength and 35,000 psi minimum shear strength. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental safety standards are met for industrial applications worldwide.