S-97832A177 8-32 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 and reducing replacement frequency.
• 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, vibration-resistant assemblies, minimizing loosening over time.
• Knurled head and hex drive design provides enhanced grip and easy installation, even in confined spaces, improving assembly efficiency.
• 3/8" shoulder length with standard fit allows for accurate pivot points and precise component alignment in machinery and rotating assemblies.
• Compliance with ASME B18.3 standards guarantees consistent quality, interchangeability, and reliability in demanding engineering applications.
• RoHS 3 and REACH compliant for environmentally responsible sourcing and use in regulated industries, ensuring safety and sustainability.

Professional Applications & Engineering Value

This 8-32 UNC shoulder screw is engineered to address critical challenges in industrial settings, such as misalignment and component wear. The 18-8 stainless steel material provides excellent corrosion resistance, making it suitable for applications exposed to moisture or chemicals, while the Rockwell B55 hardness ensures long-term durability under repetitive loads. The 3/8" shoulder length and precise Class 3A thread fit enable accurate positioning in assemblies like pivots, bearings, and gears, reducing friction and extending equipment life. With a knurled head and hex drive, installation is straightforward, even in tight spaces, enhancing productivity in automation, machinery, and electronics. Its compliance with ASME B18.3 standards ensures reliability, making it a trusted choice for engineers seeking high-performance heavy-duty fasteners that minimize downtime and maintenance costs.

Specification Summary & Compliance

This shoulder screw features a Class 3A thread fit with UNC coarse threads for superior engagement and vibration resistance. Dimensions include a shoulder diameter of 1/4" with a tolerance of -0.004" to -0.002" and a shoulder length of 1/4" with a tolerance of -0.005" to 0.005", ensuring precise alignment. Manufactured to meet ASME B18.3 specifications, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental and safety standards in industrial applications.