S-8077A432 10-24 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 316 stainless steel construction and black oxide finish, ideal for harsh industrial environments.
• Precise component alignment ensured by the 3 1/2" shoulder length with tight tolerances, reducing assembly errors and wear.
• High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications.
• Superior thread reliability provided by the Class 3A fit and coarse 10-24 UNC thread, ensuring secure fastening and vibration resistance.
• Easy installation and removal with the hex socket drive and knurled head, allowing for high-torque application without slippage.
• Long-term durability from Rockwell B79 hardness, maintaining integrity under repeated stress and load.
• Regulatory compliance and safety meeting ASME B18.3 standards, RoHS 3, and REACH, ensuring suitability for global markets.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. The 3 1/2" shoulder length with minimal tolerance provides a stable pivot or axle, minimizing misalignment and bearing wear in rotating assemblies. The black oxide finish enhances corrosion resistance, making it suitable for environments exposed to moisture, chemicals, or outdoor conditions. With a Class 3A thread fit and 10-24 UNC coarse thread, it offers reliable fastening in high-vibration applications, reducing the risk of loosening. The hex socket drive and knurled head facilitate secure tool engagement, enabling efficient maintenance in confined spaces. Ideal for use in industrial shoulder screw applications such as jigs, fixtures, and conveyor systems, it delivers consistent performance where precision and durability are paramount.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 specifications, ensuring dimensional accuracy and interchangeability. The thread fit is Class 3A with a 10-24 UNC coarse thread and right-hand direction. Shoulder diameter is 1/4" with a tolerance of -0.004" to -0.002", and shoulder length is 3 1/2" with a tolerance of -0.005" to 0.005". It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in various industrial sectors without hazardous substances.