S-97345A826 1/2"-13 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and chemical exposure
• Precise alignment and smooth rotation ensured by the 3/4" shoulder with tight diameter tolerance for reduced component wear
• High-strength fastening with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications
• Secure installation and removal using the 3/8" hex drive and knurled head for enhanced grip and torque application
• Reliable thread engagement with Class 3A fit and 1/2"-13 UNC coarse threads for vibration resistance and quick assembly
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality assurance and environmental safety
• Durable performance backed by Rockwell B79 hardness for long-term reliability under mechanical stress

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. The 3/4" shoulder diameter provides an exact pivot point or bearing surface, minimizing misalignment and reducing wear on moving parts. With a Class 3A thread fit and coarse UNC threads, it ensures secure fastening even in high-vibration environments, preventing loosening over time. The socket head with hex drive allows for easy installation in confined spaces, while the knurled texture enhances handling during assembly. Ideal for applications in robotics, conveyor systems, and manufacturing jigs, this screw offers exceptional corrosion resistance and mechanical strength, extending service life and reducing maintenance costs in demanding industrial settings.

Specification Summary & Compliance

This shoulder screw features precise dimensions including a 1/2"-13 UNC thread with Class 3A fit, 3/4" shoulder diameter (tolerance: -0.004" to -0.002"), and 7/8" thread length. It complies with ASME B18.3 specifications for dimensional accuracy and performance. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations without hazardous substances.