S-97832A317 1/4"-20 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise component alignment enabled by the 3 1/4" shoulder length with tight tolerances for stable assemblies
• High-strength performance delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Reliable thread engagement with Class 3A fit UNC coarse threads ensuring secure fastening and vibration resistance
• Easy installation and removal using the 5/32" hex socket drive and knurled head for improved grip
• Long-term durability supported by Rockwell B55 hardness, maintaining integrity under repeated use
• Regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for safe, quality-assured use

Professional Applications & Engineering Value

This socket head shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial machinery, automation systems, and precision equipment. The 18-8 stainless steel material provides excellent resistance to corrosion and oxidation, extending service life in demanding conditions. The 3 1/4" shoulder length with controlled tolerances allows for accurate positioning of moving parts, reducing wear and misalignment. Combined with a Class 3A thread fit and UNC coarse thread, it ensures robust fastening that withstands vibrations and dynamic loads. The hex socket drive and knurled head facilitate quick assembly and disassembly, enhancing maintenance efficiency in production lines and heavy-duty applications.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC thread with Class 3A fit for precise thread engagement, and a shoulder diameter of 5/16" with tolerances from -0.004" to -0.002". The shoulder length is 3 1/4" with a tolerance of -0.005" to 0.005", ensuring consistent performance. It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, guaranteeing safety and quality for industrial use.