S-97345A615 1/4"-20 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction for reliable performance in harsh industrial environments.
• High-strength durability offering 70,000 psi tensile strength and 35,000 psi shear strength to withstand heavy loads and reduce failure risks.
• Precise thread fit with Class 3A UNC coarse threads ensuring secure, vibration-resistant connections in demanding applications.
• Easy installation and removal via the 3/16" hex drive and knurled head design, improving assembly efficiency and reducing tool slippage.
• Accurate shoulder positioning with a 3/8" diameter and tight tolerances for consistent alignment in machinery and pivoting mechanisms.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.
• Enhanced wear resistance from Rockwell B79 hardness, extending service life in high-stress engineering applications.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical stress. Its 1/4"-20 UNC coarse thread and Class 3A fit provide reliable, vibration-resistant fastening in equipment like rotating shafts, linkages, and precision assemblies. The socket head with knurled texture ensures secure tool engagement, reducing installation time and errors. Ideal for industrial applications in manufacturing, automotive, and marine sectors, the screw's high tensile strength and corrosion-resistant material minimize downtime and maintenance costs, while compliance with ASME B18.3 and environmental standards guarantees consistent quality and safety.

Specification Summary & Compliance

This shoulder screw features precise dimensions including a 1/4"-20 UNC thread with Class 3A tolerance, a shoulder diameter of 3/8" (tolerance: -0.004" to -0.002"), and a shoulder length of 9/32" (tolerance: -0.005" to 0.005"). It meets ASME B18.3 specifications for manufacturing consistency and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.