S-91273A207 3/8"-16 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 2 1/2" shoulder with a tight ±0.005" length tolerance, reducing assembly errors.
• High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for reliable performance under heavy loads and stress.
• Secure and easy installation using a standard 3/16" hex drive and knurled head for improved grip and torque application.
• Consistent thread engagement with Class 2A fit and coarse 3/8"-16 UNC threads, facilitating faster assembly and disassembly.
• Enhanced durability from Rockwell B55 hardness, providing excellent wear resistance in dynamic applications.
• Compliance with global standards including RoHS 3 and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This socket head shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery and precision equipment. The 18-8 stainless steel material offers excellent corrosion resistance, making it suitable for environments exposed to moisture and chemicals. The 2 1/2" shoulder length with minimal tolerance provides a stable pivot or bearing surface, essential for reducing wear in moving parts like linkages, gears, and rotating assemblies. The coarse UNC thread and Class 2A fit ensure quick, secure fastening, while the hex drive and knurled head allow for efficient installation in confined spaces. With high tensile and shear strength, this screw maintains integrity in high-stress applications, from automotive jigs to conveyor systems, ensuring long-term reliability and reduced maintenance.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring precise manufacturing. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and suitable for global industrial use.