S-94035A229 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel and passivated finish for extended service life in harsh environments
• Precise component alignment through controlled shoulder diameter tolerance (-0.001" to 0") ensuring accurate assembly positioning
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for demanding mechanical applications
• Secure hex drive engagement via 3/16" socket head preventing cam-out and enabling high-torque installation
• Reliable thread performance with Class 2A UNC coarse threads providing consistent clamping force and vibration resistance
• Extended bearing surface from 1 3/4" shoulder length with tight length tolerance (0" to 0.002") for stable rotational support
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

This 18-8 Stainless Steel shoulder screw delivers exceptional engineering value in precision assembly applications where component alignment and rotational stability are critical. The 3/8" shoulder diameter with precise tolerance control serves as an accurate locating feature in machinery, while the 1 3/4" shoulder length provides extended bearing surface for rotating components like gears, pulleys, and linkages. The passivated finish enhances corrosion resistance in industrial environments, and the 5/16"-18 UNC coarse threads with Class 2A fit ensure reliable fastening in vibration-prone equipment. The combination of 70,000 psi tensile strength and hex drive socket head makes this shoulder screw ideal for automotive assemblies, conveyor systems, and manufacturing equipment requiring durable, precision fastening solutions.

Specification Summary & Compliance

This precision shoulder screw features Class 2A thread fit with UNC coarse thread profile, maintaining dimensional accuracy per industrial standards. The shoulder diameter tolerance of -0.001" to 0" and shoulder length tolerance of 0" to 0.002" ensure precise component positioning. Manufactured from 18-8 Stainless Steel with passivated surface treatment, the fastener complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, making it suitable for various industrial applications requiring environmental compliance and material traceability.