S-91054A503 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability - TiCN coating provides superior wear and corrosion resistance, extending service life in harsh industrial environments
• Precise Alignment - Controlled shoulder diameter tolerance (-0.002" to 0") ensures accurate component positioning and smooth rotational movement
• High Strength Performance - 70,000 psi tensile strength with Rockwell B55 hardness delivers reliable load-bearing capacity for demanding applications
• Secure Fastening - UNC coarse threads with Class 2A fit provide excellent engagement and vibration resistance in assembly operations
• Easy Installation - Hex socket drive design allows for efficient torque application and access in confined spaces
• Environmental Compliance - Meets RoHS 3 and REACH standards, ensuring safe use in regulated industries worldwide
• Material Reliability - 18-8 stainless steel construction offers excellent corrosion resistance and mechanical properties

Professional Applications & Engineering Value

This precision shoulder screw addresses critical alignment and wear challenges in industrial machinery and precision equipment. The 3/8" shoulder diameter with tight tolerances provides exact locating surfaces for rotating components, eliminating misalignment issues in assemblies. The TiCN coated 18-8 stainless steel construction combats both corrosion and abrasive wear, significantly extending maintenance intervals in automated systems. The 5/16"-18 UNC coarse threads with Class 2A fit ensure rapid assembly while maintaining vibration resistance in high-cycle applications. Engineered for precision mechanisms, conveyor systems, and robotic assemblies, this fastener delivers consistent performance where dimensional accuracy and long-term reliability are paramount.

Specification Summary & Compliance

This industrial shoulder screw features precise Class 2A thread fit with UNC coarse thread specification (5/16"-18). The shoulder maintains exact dimensional control with diameter tolerance of -0.002" to 0" and length tolerance of 0" to 0.003". Manufactured from 18-8 stainless steel with TiCN coating, the fastener achieves 70,000 psi tensile strength and Rockwell B55 hardness. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures global acceptance for industrial applications requiring strict material safety standards.