S-97832A239 2-56 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance thanks to 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
• Precise component alignment and location with a standard shoulder fit and controlled diameter/length tolerances for consistent assembly.
• Superior thread engagement and reliability from the Class 3A thread fit, minimizing the risk of cross-threading and loosening.
• High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength to withstand significant operational loads.
• Secure, non-slip fastening enabled by the knurled head texture and 5/64" hex socket drive for firm tool grip.
• Broad industry compliance with RoHS 3 and REACH regulations, ensuring environmental and safety standards are met.
• Durability and wear resistance provided by a Rockwell B55 hardness, maintaining performance over repeated use.

Professional Applications & Engineering Value

This 2-56 UNC shoulder screw is engineered to solve critical alignment and spacing challenges in precision assemblies. The 18-8 stainless steel material offers excellent corrosion resistance, making it suitable for applications in electronics, medical devices, and automated machinery where exposure to moisture or chemicals is a concern. The Class 3A thread fit ensures tight, reliable fastening in UNC coarse threads, reducing the risk of vibration-induced loosening. The knurled socket head provides enhanced grip for installation, while the precisely machined shoulder acts as a pivot, bearing surface, or locator, eliminating the need for additional spacers or bushings. This design streamlines assembly, reduces part count, and enhances the overall structural integrity of your mechanical systems.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for high precision. Key dimensional tolerances include a shoulder diameter tolerance of -0.004" to -0.002" and a shoulder length tolerance of -0.005" to 0.005". It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for regulated industries.