S-97345A912 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 extended service life.
• Exceptional mechanical strength offering a 70,000 psi tensile strength and 35,000 psi minimum shear strength for reliable performance under high stress.
• Precision alignment and secure fit provided by the 1" diameter shoulder with tight tolerances, ensuring accurate component positioning.
• High-accuracy Class 3A thread fit for superior engagement and vibration resistance in demanding applications.
• Secure and efficient installation enabled by the knurled socket head and 1/2" hex drive, preventing tool slippage.
• Robust durability with a Rockwell B79 hardness, maintaining integrity through repeated use and assembly cycles.
• Broad industry compliance meeting ASME B18.3, RoHS 3, and REACH standards for quality and environmental safety.

Professional Applications & Engineering Value

This 316 Stainless Steel shoulder screw is engineered to address critical challenges in precision machinery and industrial assembly. The 3/4"-10 UNC coarse thread with Class 3A fit ensures fast, secure fastening with excellent resistance to loosening under vibration, a common issue in dynamic systems. The precisely machined 1" shoulder diameter and 4" shoulder length provide a stable bearing surface for rotating parts like gears and pulleys, eliminating misalignment and reducing wear. The knurled socket head with a 1/2" hex drive allows for high-torque installation without cam-out, enhancing worker safety and assembly speed. Its high tensile strength and corrosion-resistant material make it suitable for applications in chemical processing, marine equipment, and food machinery where durability and compliance with strict regulations are paramount.

Specification Summary & Compliance

This shoulder screw features a 3/4"-10 UNC coarse thread with a Class 3A thread fit for precision engagement. The shoulder diameter is 1" with a tolerance of -0.004" to -0.002", and the shoulder length is 4" with a tolerance of -0.005" to 0.005", ensuring exact dimensional control. Manufactured in compliance with ASME B18.3 specifications, it is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to international safety and environmental standards for industrial fasteners.