S-91273A627 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Mechanical Strength: Withstands high-stress applications thanks to 70,000 psi tensile strength and 35,000 psi minimum shear strength, ensuring reliable performance in demanding environments.
• Superior Corrosion Resistance: Made from 18-8 stainless steel with a black oxide finish, offering enhanced durability and protection against rust and oxidation in harsh industrial settings.
• Precision Thread Fit: Class 2A UNC coarse threads provide consistent, secure fastening with reduced risk of cross-threading, improving assembly efficiency and joint integrity.
• Secure and Easy Installation: Hex socket drive (3/16") combined with a knurled head texture ensures non-slip grip and allows for high-torque application with standard tools, minimizing installation time.
• Accurate Shoulder Dimensions: Tight tolerances on shoulder diameter and length (-0.004" to -0.002" and -0.005" to 0.005" respectively) enable precise alignment and smooth rotation in pivoting or spacing applications.
• Regulatory Compliance: Meets RoHS 3 and REACH standards, ensuring environmental safety and suitability for global industrial supply chains without hazardous substances.
• Optimized for Heavy-Duty Use: Rockwell B55 hardness and robust shoulder design deliver long-lasting wear resistance, reducing maintenance needs and replacement costs.

Professional Applications & Engineering Value

This black oxide 18-8 stainless steel shoulder screw is engineered to address critical challenges in machinery assembly, automation systems, and precision equipment. The 3/8"-16 UNC coarse thread with Class 2A fit ensures quick, reliable fastening while minimizing vibration loosening in dynamic applications. The knurled head texture and hex socket drive provide superior grip and torque transmission, essential for high-stress environments like robotics, conveyor systems, and metal fabrication. Its 1/2" shoulder length and precise diameter tolerances facilitate exact component spacing and smooth rotational movement, eliminating misalignment issues. Ideal for pivots, axles, and guides, this screw enhances operational reliability and reduces downtime in industrial shoulder screw applications.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted substances. Key specifications include a shoulder diameter tolerance of -0.004" to -0.002", shoulder length tolerance of -0.005" to 0.005", and mechanical properties verified to 70,000 psi tensile strength and 35,000 psi shear strength, ensuring reliability in precision engineering applications.