S-97345A156 2-56 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 316 stainless steel construction, ideal for harsh industrial environments
• Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for reliable, heavy-duty performance
• Precise Class 3A thread fit ensures secure, vibration-resistant assemblies with minimal backlash
• Knurled socket head with 5/64" hex drive provides superior grip and torque transmission during installation
• Accurate shoulder dimensions with tight tolerances for precise alignment and spacing in assemblies
• Full regulatory compliance with RoHS 3 and REACH standards for safe, environmentally responsible use
• Coarse UNC threading enables quick assembly and disassembly while maintaining strong holding power

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw delivers critical performance advantages in demanding applications where corrosion resistance and precision alignment are paramount. The UNC Class 3A threads provide superior engagement in tapped holes, reducing the risk of cross-threading and ensuring consistent clamping force in vibration-prone environments. The precisely machined shoulder diameter and length serve as reliable locating surfaces for rotating components, bearings, and linkages, eliminating the need for additional spacers or bushings. The knurled socket head with hex drive prevents tool slippage during high-torque installation, while the Rockwell B79 hardness maintains thread integrity through repeated assembly cycles. Ideal for precision machinery, medical equipment, and marine applications where corrosion-resistant fasteners must maintain dimensional stability under load.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit per UNC specifications, ensuring precise engagement and consistent performance. Critical dimensions include 2-56 UNC thread with 1/8" length, 3/32" shoulder diameter (-0.004" to -0.002" tolerance), and 7/32" shoulder length (-0.005" to 0.005" tolerance). Mechanical properties include 70,000 psi tensile strength and 35,000 psi minimum shear strength with Rockwell B79 hardness. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use.