S-92183A283 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments and extended service life.
• Precise component alignment ensured by the Class 3A thread fit and standard shoulder, minimizing assembly play and vibration.
• High mechanical strength with 70,000 psi tensile and 35,000 psi shear ratings for reliable performance under heavy loads.
• Secure and efficient installation using a standard 1/8" hex drive and knurled head for improved grip during tightening.
• Versatile coarse threading (1/4"-20 UNC) allows for faster assembly and disassembly compared to fine-thread alternatives.
• Consistent dimensional accuracy with tight shoulder diameter and length tolerances for repeatable, high-quality fits.
• Compliance with global regulations including RoHS 3 and REACH, ensuring material safety and environmental responsibility.

Professional Applications & Engineering Value

This stainless steel shoulder screw is engineered to address critical alignment and durability challenges in precision machinery and automated systems. The 18-8 Stainless Steel material provides excellent resistance to rust and corrosion, making it suitable for applications exposed to moisture, chemicals, or outdoor conditions. The Class 3A thread fit and precisely machined shoulder ensure minimal radial play, which is essential for maintaining accurate positioning of rotating parts, gears, and linkages. The coarse UNC thread facilitates quick assembly, while the knurled socket head allows for secure tool engagement, reducing the risk of stripping during high-torque installation. These features make it an ideal choice for industrial equipment, pivoting mechanisms, and any application requiring a robust, high-strength shoulder bolt that maintains alignment under dynamic loads.

Specification Summary & Compliance

This shoulder screw adheres to UNC coarse thread standards with a Class 3A fit for high precision. Key dimensional tolerances include a shoulder diameter of 1/4" with a tolerance of -0.004" to -0.002" and a shoulder length tolerance of -0.002" to 0.002". The screw is manufactured from 18-8 Stainless Steel with a hardness of Rockwell B55, tensile strength of 70,000 psi, and minimum shear strength of 35,000 psi. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use.