S-97345A675 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 or wet environments.
• High tensile and shear strength (70,000 psi tensile, 35,000 psi shear) ensures reliable performance under heavy loads.
• Precise Class 3A thread fit provides excellent engagement and vibration resistance in assemblies.
• Knurled head texture offers enhanced grip for easier manual adjustments during installation.
• Standard hex socket drive (3/16") allows for secure, high-torque fastening with common tools.
• Long 1 7/8" shoulder length accommodates precise component spacing and rotational movement.
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address common industrial challenges, such as component misalignment and corrosion-induced failure. Its 1/4"-20 UNC coarse thread and Class 3A fit ensure quick assembly and secure fastening in high-vibration settings like machinery, automotive, and aerospace systems. The knurled head enhances handling during precision adjustments, while the extended shoulder provides stable bearing surfaces for rotating parts. With excellent tensile and shear strength, it supports demanding applications where durability and reliability are critical, reducing maintenance needs and downtime.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC coarse thread with Class 3A fit for precise tolerance, a shoulder diameter of 3/8" (tolerance: -0.004" to -0.002"), and shoulder length of 1 7/8" (tolerance: -0.005" to 0.005"). It meets ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industry-standard quality.