S-91273A203 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and mechanical stress.
• Precise Class 2A thread fit guarantees smooth assembly and secure fastening in UNC coarse thread applications.
• Knurled hex socket head provides superior grip and prevents tool slippage during installation.
• Accurate shoulder dimensions with tight tolerances enable consistent alignment and reduced wear in moving parts.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and global market acceptance.
• Rockwell B55 hardness offers excellent durability and resistance to deformation in demanding applications.

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision machinery. The 18-8 stainless steel material provides robust corrosion resistance, making it suitable for applications in automotive assemblies, conveyor systems, and electronic enclosures where exposure to moisture or chemicals is common. The hex socket head with knurled texture ensures secure tool engagement, reducing installation errors and maintenance downtime. With a coarse thread and Class 2A fit, it facilitates quick assembly while maintaining high shear strength (35,000 psi minimum) for rotational components like pulleys and gears. This screw's shoulder design with precise tolerances minimizes play, enhancing operational stability and extending equipment lifespan in industrial settings.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. Key specifications include a thread size of 3/8"-16, shoulder diameter of 3/8" (tolerance: -0.004" to -0.002"), and shoulder length of 5/16" (tolerance: -0.005" to 0.005"). It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety requirements for industrial use.