S-97345A246 1/4"-20 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 70,000 psi tensile and 35,000 psi shear strength for reliable performance in high-stress applications.
• Precise Class 3A thread fit ensures tighter tolerances and secure fastening, reducing the risk of loosening under vibration.
• Enhanced grip and torque application from the knurled socket head and 3/16" hex drive, allowing for easy installation and removal.
• Accurate component alignment with a 3/8" shoulder diameter and 1" shoulder length, providing stable bearing surfaces for rotating parts.
• Broad industrial compliance meeting ASME B18.3 standards, RoHS 3, and REACH regulations for safe and reliable use.
• Durable coarse UNC thread designed for quick assembly and high resistance to stripping in demanding conditions.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision assembly and machinery. The 1/4"-20 UNC coarse thread with Class 3A fit provides excellent vibration resistance and secure fastening, minimizing maintenance needs in automated systems. Its knurled socket head enhances tool grip, reducing slippage during torque application in confined spaces. The precisely machined shoulder ensures accurate alignment of components like gears and pulleys, preventing misalignment and wear. Ideal for industrial applications including robotics, conveyor systems, and manufacturing equipment, this screw offers reliable performance in corrosive or high-stress environments, supported by its high tensile and shear strength.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC coarse thread with Class 3A thread fit for precision. Dimensions include a shoulder diameter of 3/8" (tolerance: -0.004" to -0.002") and shoulder length of 1" (tolerance: -0.005" to 0.005"). Manufactured to ASME B18.3 specifications, it is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, ensuring adherence to environmental and safety standards.