S-8077A725 8-32 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh industrial environments and extended service life.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high-stress conditions.
• Precise Class 3A thread fit ensures secure, vibration-resistant assemblies with minimal risk of loosening in critical applications.
• Enhanced durability and wear resistance from the Black Oxide finish, which also reduces light reflection and provides a sleek appearance.
• Easy installation and removal with a knurled socket head and 3/32" hex drive, allowing for better grip and torque application.
• Accurate shoulder positioning with tight tolerances on diameter and length, facilitating precise component alignment in assemblies.
• Compliance with global standards including RoHS 3 and REACH, ensuring environmental safety and regulatory acceptance for international projects.

Professional Applications & Engineering Value

This 8-32 UNC thread shoulder screw is engineered to address common industrial challenges such as component misalignment, corrosion-induced failure, and assembly inefficiency. The 316 Stainless Steel material provides excellent resistance to chemicals and moisture, making it suitable for marine, chemical processing, and outdoor equipment. The Black Oxide finish enhances surface hardness and reduces galling, while the Class 3A thread fit and precise shoulder dimensions ensure stable, repeatable positioning in machinery, pivots, and rotating assemblies. Its coarse UNC thread allows for quick installation, and the knurled socket head offers superior tool engagement, reducing slippage during high-torque applications. Ideal for use in precision instruments, automotive systems, and heavy-duty industrial equipment, this fastener delivers long-term reliability and reduces maintenance downtime.

Specification Summary & Compliance

This shoulder screw features a Class 3A thread fit with UNC coarse threads, ensuring high precision and interchangeability. Dimensions include a shoulder diameter of 3/16" (tolerance: -0.004" to -0.002") and shoulder length of 9/16" (tolerance: -0.005" to 0.005"), providing consistent alignment. Manufactured to Rockwell B79 hardness and mechanical properties including 70,000 psi tensile strength and 35,000 psi minimum shear strength. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, supporting environmentally safe and regulated industrial use.