S-8077A485 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel and black oxide finish, ideal for harsh industrial environments.
• High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing applications.
• Precise Class 3A thread fit ensures tight tolerances and secure fastening in critical assemblies.
• Easy and secure installation with a knurled socket head and 5/64" hex drive, reducing slippage and tool wear.
• Durable construction with Rockwell B79 hardness for long-term performance under stress.
• Compliance with environmental standards including RoHS 3 and REACH, ensuring safe use in regulated industries.
• Versatile shoulder design with standard fit for accurate alignment and spacing in machinery components.

Professional Applications & Engineering Value

This 4-40 UNC thread shoulder screw is engineered to address common industrial challenges, such as corrosion and misalignment in precision equipment. Made from 316 stainless steel with a black oxide finish, it provides excellent resistance to chemicals and moisture, extending service life in demanding settings like marine, chemical processing, and food machinery. The Class 3A thread fit and coarse UNC threading ensure quick, reliable assembly with minimal risk of cross-threading, while the knurled socket head enhances grip during installation, reducing downtime. Ideal for applications requiring high tensile strength and consistent shoulder positioning, this screw supports efficient maintenance and robust performance in industrial shoulder screw assemblies.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A fit for precise dimensional accuracy, including thread diameter of 0.112" and shoulder diameter tolerance of -0.004" to -0.002". It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and regulatory approval for industrial use.