S-97768A242 10-32 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 extended service life.
• Enhanced durability and wear resistance from the black oxide finish, which also provides a sleek, non-reflective appearance.
• Exceptional thread reliability with a Class 3A fit, ensuring precise, secure fastening and vibration resistance in critical assemblies.
• High mechanical strength offering 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications.
• Precise component alignment facilitated by the 1/4" diameter shoulder with tight tolerances, reducing wear on mating parts.
• Secure and easy installation with a hex socket drive and knurled head, providing excellent grip and torque transmission.
• Broad industry compliance meeting ASME B18.3 specifications and environmental standards like RoHS 3 and REACH.

Professional Applications & Engineering Value

This 10-32 UNF shoulder screw is engineered to solve critical alignment and fastening challenges in precision machinery. The 18-8 stainless steel material provides excellent resistance to corrosion and oxidation, making it suitable for applications in automotive, aerospace, and industrial equipment where environmental factors are a concern. The fine UNF thread and Class 3A fit ensure a tight, reliable connection that minimizes the risk of loosening under vibration, a common pain point in dynamic assemblies. The black oxide finish not only enhances corrosion protection but also reduces galling during installation. The precisely machined shoulder acts as a pivot or bearing surface, allowing for accurate positioning of components like gears, pulleys, and linkages, thereby reducing wear and improving the overall longevity and performance of the mechanism.

Specification Summary & Compliance

This shoulder screw features a 10-32 UNF fine thread with a Class 3A thread fit for high precision. Key dimensional tolerances include a shoulder diameter of 1/4" with a tolerance of -0.004" to -0.002" and a shoulder length of 5/16" with a tolerance of -0.005" to 0.005". It is manufactured in compliance with ASME B18.3 specifications and is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets stringent industry and environmental standards for safe and reliable use.