S-8077A431 10-24 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and extended service life.
• Enhanced durability and wear resistance from the black oxide finish, providing added protection against abrasion and galling.
• High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength for reliable load-bearing in demanding applications.
• Precise alignment and positioning ensured by the Class 3A thread fit and standard shoulder fit, reducing assembly errors.
• Secure and non-slip installation facilitated by the knurled socket head and hex drive, allowing for high-torque fastening.
• Wide compatibility with UNC coarse thread spacing and right-hand thread direction, suitable for various industrial equipment and machinery.
• Regulatory compliance and safety meeting ASME B18.3, RoHS 3, and REACH standards, ensuring environmental and health safety in global markets.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw with a black oxide finish is engineered to address critical challenges in precision assemblies, such as misalignment and corrosion-induced failure. The 10-24 UNC thread with Class 3A fit ensures tight tolerances, minimizing vibration loosening in machinery like rotating shafts and pivoting mechanisms. Its high tensile and shear strength supports heavy-duty applications in automotive, aerospace, and manufacturing, where reliability under stress is paramount. The knurled socket head enhances grip during installation, reducing tool slippage and improving efficiency in automated or manual fastening processes. Ideal for use in industrial fasteners requiring consistent performance, this screw offers long-term value by resisting harsh chemicals and moisture, thereby lowering maintenance costs and downtime.

Specification Summary & Compliance

This shoulder screw adheres to precise dimensional standards, including a Class 3A thread fit for superior accuracy and a shoulder diameter tolerance of -0.004" to -0.002". It conforms to ASME B18.3 specifications for consistent manufacturing quality and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for industrial use worldwide.