S-8077A418 10-24 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance for harsh environments, thanks to 316 stainless steel construction and protective black oxide finish
• Exceptional mechanical strength with 70,000 psi tensile strength and 35,000 psi minimum shear strength for reliable load-bearing applications
• Precise assembly and alignment ensured by a 1-inch shoulder with tight diameter and length tolerances for stable component positioning
• High-accuracy thread engagement with Class 3A fit and coarse UNC thread spacing, reducing cross-threading risks and speeding installation
• Secure, tool-friendly installation via a standard socket head with 1/8" hex drive and knurled texture for enhanced grip
• Long-term reliability supported by Rockwell B79 hardness and compliance with ASME B18.3 manufacturing standards
• Environmentally responsible design meeting RoHS 3 and REACH regulations, ensuring safe use in regulated industries

Professional Applications & Engineering Value

This 10-24 UNC shoulder screw is engineered to address critical industrial challenges, such as misalignment and corrosion-induced failure. The 316 stainless steel material offers excellent resistance to chemicals and moisture, while the black oxide finish adds an extra layer of protection against wear and oxidation. The 1-inch shoulder length with precise tolerances allows for accurate spacing and rotational control in assemblies, minimizing vibration and part movement. Commonly used in machinery, automotive, and electronics, this socket head shoulder screw ensures consistent performance in high-stress applications, supported by its Class 3A thread fit and robust construction. Its compliance with ASME B18.3 standards guarantees interoperability and quality, making it a trusted choice for engineers seeking durability and precision.

Specification Summary & Compliance

This shoulder screw adheres to strict dimensional and performance criteria, including a Class 3A thread fit for tight tolerances and UNC coarse threading (10-24 size) to facilitate quick assembly. The shoulder features a diameter of 1/4" with a tolerance of -0.004" to -0.002" and a length of 1" with a tolerance of -0.005" to 0.005", ensuring precise fit in applications. It conforms to ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, underscoring its commitment to safety and environmental standards.