S-97832A308 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 environments and reducing long-term replacement costs.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for high-stress applications and reliable load-bearing performance.
• Precise Class 3A thread fit ensures tight, secure fastening with minimal backlash, enhancing assembly accuracy and vibration resistance.
• Knurled socket head with hex drive provides a non-slip grip for easy installation and removal, even in confined spaces.
• Integrated shoulder design with a 5/16" diameter acts as a precise pivot or spacer, improving component alignment and reducing wear.
• Broad industry compliance including ASME B18.3, RoHS, and REACH, guaranteeing quality, safety, and environmental standards for global supply chains.
• Coarse UNC thread facilitates quick assembly and disassembly, boosting efficiency in maintenance and production lines.

Professional Applications & Engineering Value

This 1/4-20 UNC shoulder screw is engineered to address critical challenges in industrial applications where precision alignment and durability are paramount. The 18-8 Stainless Steel material provides excellent corrosion resistance, making it suitable for machinery exposed to moisture, chemicals, or outdoor conditions. The Class 3A thread fit and precisely machined shoulder diameter ensure components remain securely positioned, minimizing misalignment and wear in rotating assemblies, pivots, or guides. With a hex socket drive and knurled head, it allows for reliable torque application without slippage, enhancing worker safety and assembly speed. Ideal for use in automation equipment, conveyor systems, and precision instruments, this screw delivers long-term reliability and reduces maintenance downtime, supported by its high tensile and shear strength.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit for precise dimensional accuracy and is manufactured in accordance with ASME B18.3 standards. It features a 5/16" shoulder diameter with a tolerance of -0.004" to -0.002" and a 3/16" shoulder length with a tolerance of -0.005" to 0.005". The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets stringent environmental and safety regulations for industrial use.