S-97345A509 10-32 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 extended service life.
• Exceptional mechanical strength with 70,000 psi tensile strength and 35,000 psi shear strength, ensuring reliable performance under high-stress conditions.
• Precision alignment and smooth rotation provided by the 1/4" diameter shoulder with tight tolerances, reducing wear on mating components.
• Secure, high-torque installation enabled by the Class 3A fine UNF thread and 1/8" hex socket drive, preventing stripping and ensuring a tight fit.
• Easy manual handling and adjustment thanks to the knurled head texture, offering improved grip during assembly and disassembly.
• Guaranteed dimensional consistency and interchangeability, manufactured in compliance with the rigorous ASME B18.3 standard.
• Safe for sensitive applications as it is fully compliant with RoHS 3 and REACH environmental regulations, containing no hazardous substances.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision assembly and motion control systems. The fine 10-32 UNF thread with a Class 3A fit provides superior vibration resistance and clamping force in applications like rotating shafts, pivots, and guides, preventing loosening under dynamic loads. The 2-1/4" shoulder length acts as a precise spacer or axle, maintaining exact distances between components and reducing friction and misalignment. The combination of the hex socket drive and knurled head ensures secure installation in confined spaces while allowing for tool-free adjustments. Its high tensile strength and corrosion resistance make it a durable choice for demanding sectors such as automation, medical devices, and food processing machinery, where reliability and compliance with industry standards are paramount.

Specification Summary & Compliance

This shoulder screw features a 10-32 UNF fine thread with a Class 3A thread fit for high precision. The shoulder diameter is 1/4" with a tolerance of -0.004" to -0.002", and the shoulder length is 2-1/4" with a tolerance of -0.005" to 0.005". It is manufactured to meet ASME B18.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material quality.