S-97345A909 3/4"-10 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.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high-stress conditions.
• Precise Class 3A thread fit ensures tight, secure fastening with minimal backlash in demanding assemblies.
• Convenient 1/2" hex socket drive with knurled head for enhanced grip and easy installation, even in confined spaces.
• Accurate shoulder positioning with a 1" diameter and 3 1/2" length, providing stable alignment for rotating components like gears and pulleys.
• Robust Rockwell B79 hardness for excellent wear resistance and long-term durability in repetitive motion applications.
• Compliance with major standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and environmental safety for global supply chains.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery. The 3/4"-10 UNC coarse thread with Class 3A fit provides superior holding power, reducing the risk of loosening in high-vibration environments like conveyor systems and motor mounts. The precisely machined 1" shoulder diameter and 3 1/2" shoulder length act as a reliable pivot or spacer for bearings, linkages, and cam followers, minimizing wear and maintenance. With a knurled head and 1/2" hex drive, installation is swift and secure, enhancing assembly efficiency. Its high tensile and shear strength makes it suitable for heavy-duty applications in automotive, packaging, and material handling equipment, where corrosion resistance and long service life are paramount.

Specification Summary & Compliance

This shoulder screw features a 3/4"-10 UNC coarse thread with Class 3A fit for precise thread engagement. The shoulder diameter is 1" with a tolerance of -0.004" to -0.002", and the shoulder length is 3 1/2" with a tolerance of -0.005" to 0.005", ensuring consistent dimensional accuracy. It meets ASME B18.3 specifications for dimensional and mechanical requirements, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and suitable for use in regulated industries.