S-97768A414 3/8"-24 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.
• High-strength performance offering 70,000 psi tensile strength and 35,000 psi shear strength for reliable load-bearing in demanding applications.
• Precise thread engagement with Class 3A fit and UNF fine thread, ensuring secure fastening and vibration resistance.
• Enhanced durability from Rockwell B55 hardness, providing excellent wear resistance and long service life.
• Easy installation and removal featuring a knurled socket head with hex drive for non-slip tool grip and efficient assembly.
• Accurate shoulder dimensions with tight tolerances for precise alignment and spacing in machinery and fixtures.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.

Professional Applications & Engineering Value

This shoulder screw is engineered to address critical challenges in precision assemblies, such as maintaining exact component alignment and resisting loosening under dynamic loads. The 18-8 Stainless Steel material combined with a Black Oxide finish provides robust corrosion protection, making it suitable for automotive, aerospace, and manufacturing equipment exposed to moisture or chemicals. Its 3/8"-24 UNF fine thread and Class 3A fit deliver superior thread engagement, reducing the risk of stripping and ensuring consistent clamping force in high-vibration environments. The knurled socket head with hex drive allows for quick, secure tool engagement, streamlining maintenance and reducing assembly time. Ideal for pivots, rotating shafts, and spacers, this screw enhances operational reliability and minimizes downtime in industrial settings.

Specification Summary & Compliance

This shoulder screw features precise dimensions, including a 1/2" shoulder diameter with tolerances from -0.004" to -0.002" and a 1/2" thread length. The UNF thread adheres to Class 3A fit standards for high accuracy, while manufacturing complies with ASME B18.3 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met for industrial use.