S-8077A421 10-24 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh industrial environments and chemical exposure
• Enhanced durability and wear resistance from the Black Oxide finish, providing long-lasting performance and reduced maintenance
• High tensile strength of 70,000 psi ensures reliable fastening under heavy loads and mechanical stress
• Precision Class 3A thread fit for secure, vibration-resistant connections in critical assemblies
• Knurled socket head with hex drive allows for easy installation and removal, even in tight spaces
• Accurate 3" shoulder length with tight tolerances enables precise component alignment and rotational movement
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards for global applications

Professional Applications & Engineering Value

This 10-24 UNC thread shoulder screw is engineered to address common challenges in precision machinery, automation systems, and rotating assemblies. The 316 Stainless Steel material offers exceptional resistance to corrosion and oxidation, making it suitable for marine, chemical processing, and outdoor applications where moisture and chemicals are present. The Black Oxide finish not only enhances aesthetic appeal but also reduces galling and friction during operation. With a coarse thread spacing and Class 3A thread fit, it provides quick assembly and reliable holding power, minimizing the risk of loosening under dynamic loads. The 3" shoulder length with precise tolerances ensures accurate positioning of components like bearings, gears, and pulleys, reducing wear and improving overall system efficiency. Ideal for use in industrial fasteners for conveyors, robotics, and packaging equipment, this screw delivers consistent performance where alignment and durability are critical.

Specification Summary & Compliance

This shoulder screw features a 10-24 UNC thread with Class 3A precision fit, ensuring tight dimensional accuracy and reliable engagement. The shoulder diameter is 1/4" with a tolerance of -0.004" to -0.002", and the shoulder length is 3" with a tolerance of -0.005" to 0.005", providing consistent performance in assembly. Manufactured in compliance with ASME B18.3 standards, it meets rigorous engineering specifications. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for hazardous substances.