S-90337A151 2-56 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments
• Precise component alignment through controlled shoulder diameter and length tolerances, reducing assembly errors
• High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Space-saving low-profile design with socket head and 5/64" hex drive for installations with limited clearance
• Reliable thread engagement with Class 2A UNC coarse threads providing secure fastening in various materials
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global manufacturing requirements
• Optimized drive efficiency with hex socket design enabling high torque application without cam-out

Professional Applications & Engineering Value

This precision shoulder screw addresses critical alignment challenges in industrial assemblies where component positioning directly impacts performance. The 18-8 stainless steel construction with passivated finish provides exceptional corrosion resistance for electronics, medical devices, and aerospace applications exposed to moisture or chemicals. The low profile socket head with 5/64" hex drive enables installation in confined spaces while maintaining high torque capability. The precisely controlled shoulder diameter and length tolerances ensure accurate component spacing and rotational stability, eliminating the need for additional spacers or complex alignment fixtures. The 2-56 UNC coarse threads with Class 2A fit provide reliable engagement in both metallic and non-metallic materials, making these industrial shoulder screws ideal for precision mechanisms, bearing retention, and pivot applications requiring exact axial positioning.

Specification Summary & Compliance

This shoulder screw maintains Class 2A thread fit per UNC standards with precise shoulder diameter tolerance (-0.001" to 0") and shoulder length tolerance (0" to 0.002"). Manufacturing conforms to inch system specifications with 2-56 UNC coarse threads, right-hand thread direction, and smooth head texture. The component is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for industrial use across global markets.