S-97768A237 8-32 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Corrosion-resistant 18-8 stainless steel construction ensures long-term durability in harsh industrial environments, reducing replacement costs and maintenance downtime.
• Black oxide finish enhances surface protection and provides a sleek, low-glare appearance suitable for precision assemblies.
• Class 3A thread fit with 8-32 UNC coarse threads delivers superior vibration resistance and reliable fastening in high-stress applications.
• 1/4" shoulder diameter with precise tolerances allows for accurate alignment of components, minimizing wear and ensuring smooth rotational movement.
• High tensile strength (70,000 psi) and shear strength (35,000 psi) provide exceptional load-bearing capacity for demanding mechanical systems.
• Knurled socket head with hex drive offers secure, slip-resistant tool engagement for easy installation and removal in confined spaces.
• Compliance with ASME B18.3, RoHS 3, and REACH standards guarantees consistent quality, safety, and environmental responsibility for global supply chains.

Professional Applications & Engineering Value

This shoulder screw is engineered to address critical alignment and durability challenges in precision machinery, such as rotating assemblies, pivoting mechanisms, and bearing mounts. The 18-8 stainless steel material combined with a black oxide finish provides excellent corrosion resistance, making it ideal for humid or chemically aggressive environments. The 8-32 UNC coarse threads with Class 3A fit ensure tight, vibration-resistant connections, while the precisely machined 1/4" shoulder diameter acts as a reliable pivot or spacer, reducing component misalignment and extending equipment lifespan. Its high tensile and shear strength supports heavy-duty applications in automotive, aerospace, and industrial automation, where failure is not an option.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit and UNC coarse thread standards, with shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005" for precise dimensional control. It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and sustainable use across global markets.