S-97768A280 10-32 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction and Black Oxide finish, ideal for harsh industrial environments.
• Precise alignment and reduced wear thanks to the 3" shoulder length with tight tolerances, ensuring accurate component positioning.
• High-strength performance delivering 70,000 psi tensile and 35,000 psi shear strength for reliable, heavy-duty applications.
• Secure, fine-thread engagement with 10-32 UNF Class 3A thread fit, minimizing the risk of loosening under vibration.
• Easy installation and removal using a standard 1/8" hex drive and knurled socket head for improved grip.
• Enhanced durability with Rockwell B55 hardness, providing excellent resistance to deformation and wear.
• Regulatory peace of mind by meeting ASME B18.3 standards and being RoHS 3 and REACH compliant.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to solve critical alignment and pivot point challenges in industrial machinery, automation systems, and precision instruments. The 18-8 Stainless Steel material, combined with a Black Oxide finish, offers excellent resistance to rust and corrosion, extending service life in demanding conditions. The 3" shoulder length with minimal tolerance ensures exact positioning of moving parts, reducing wear and maintaining operational accuracy. Its 10-32 UNF fine thread and Class 3A fit provide secure fastening in applications subject to vibration, while the socket head with hex drive allows for efficient installation in confined spaces. Ideal for use in assemblies requiring high tensile and shear strength, this screw enhances reliability and reduces maintenance needs in heavy-duty engineering projects.

Specification Summary & Compliance

This shoulder screw features a 10-32 UNF thread with Class 3A fit for precise thread engagement. The shoulder diameter is 1/4" with a tolerance of -0.004" to -0.002", and the shoulder length is 3" with a tolerance of -0.005" to 0.005", ensuring high dimensional accuracy. It complies with ASME B18.3 manufacturing specifications and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting environmental and safety standards for industrial use.