S-99154A395 2-56 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh environments
• Precise component alignment ensured by the accurately machined shoulder with minimal diameter and length tolerances
• High-strength fastening with 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing applications
• Space-saving low-profile socket head allows for installation in confined spaces while providing secure slotted drive engagement
• Consistent thread engagement with Class 2A UNC coarse threads for quick assembly and vibration resistance
• Environmental compliance assurance with RoHS 3 and REACH regulations for global manufacturing applications
• Optimized for industrial durability combining precise shoulder fit with right-hand threading for repeated use in mechanical assemblies

Professional Applications & Engineering Value

This precision shoulder screw delivers exceptional engineering value in applications requiring exact component positioning and rotational control. The 18-8 stainless steel construction provides excellent corrosion resistance while maintaining Rockwell B55 hardness for wear resistance in dynamic assemblies. The low profile socket head design enables flush mounting in space-constrained machinery, while the UNC coarse threads ensure rapid installation and superior vibration resistance. The precisely machined shoulder with tight diameter and length tolerances eliminates component wobble in precision instruments, automation equipment, and rotating mechanisms. With 70,000 psi tensile strength, this fastener maintains structural integrity under significant mechanical stress, making it ideal for industrial machinery, medical devices, and electronic enclosures where reliability is critical.

Specification Summary & Compliance

Manufactured to exact Class 2A thread fit standards with UNC coarse threading (2-56) in the inch measurement system. Features precise shoulder dimensions: 3/32" diameter (-0.001" to 0" tolerance) and 5/16" length (0" to 0.002" tolerance). Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Mechanical properties include Rockwell B55 hardness and 70,000 psi tensile strength for industrial-grade performance.