S-97768A123 3-48 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and reducing maintenance costs.
• Enhanced torque transmission and slip resistance from the knurled socket head and 5/64" hex drive, ensuring secure installation and removal.
• High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, providing reliable performance under significant loads.
• Precise alignment and pivot points due to the 1/8" shoulder diameter with tight tolerances, minimizing part wear and misalignment.
• Durable, wear-resistant black oxide finish that reduces galling and provides a sleek, professional appearance.
• Consistent and reliable thread engagement with Class 3A fit and coarse UNC threads, enabling quick assembly and high vibration resistance.
• Compliance with global environmental standards including RoHS 3 and REACH, ensuring safe use in regulated industries.

Professional Applications & Engineering Value

This 3-48 UNC shoulder screw is engineered to address critical challenges in precision assemblies, such as providing exact rotational or linear movement in machinery, jigs, and electronic equipment. The 18-8 stainless steel material offers excellent resistance to rust and corrosion, which is vital for applications in moist or chemically aggressive settings. The black oxide finish not only enhances durability but also reduces friction during operation. With its 1/8" shoulder diameter and Class 3A thread fit, it ensures tight tolerances for components like bearings, gears, and linkages, preventing axial movement and reducing wear. The coarse thread design allows for faster installation and better performance in high-vibration environments, making it a reliable choice for automotive, aerospace, and industrial automation systems where precision and longevity are paramount.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for precise, secure fastening. The shoulder diameter is manufactured to a tight tolerance of -0.004" to -0.002", and the shoulder length tolerance is -0.005" to 0.005", ensuring high dimensional accuracy. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting stringent environmental and safety requirements for industrial use.