S-91273A284 3/4"-10 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and reducing maintenance costs.
• High tensile and shear strength (70,000 psi and 35,000 psi minimum respectively) ensures reliable performance under heavy loads and stress.
• Precision shoulder and thread fit with Class 2A thread fit and tight shoulder tolerances for accurate alignment and reduced assembly vibration.
• Secure and easy installation featuring a hex socket drive and knurled head for superior grip and torque application with standard tools.
• Durable and wear-resistant with a Rockwell B55 hardness, providing long service life in high-friction applications.
• Broad compatibility due to UNC coarse threads and right-hand thread direction, fitting common industrial standards and components.
• Compliant with environmental regulations including RoHS 3 and REACH, ensuring safety and suitability for global markets.

Professional Applications & Engineering Value

This 18-8 Stainless Steel shoulder screw is engineered to address critical alignment and durability challenges in precision machinery. The 4-1/2" shoulder length with minimal tolerances acts as a stable axle or pivot, preventing misalignment in rotating assemblies like conveyor systems, robotic arms, and printing equipment. The coarse UNC thread and Class 2A fit enable quick, secure fastening, reducing assembly time while maintaining positional accuracy under dynamic loads. Made from corrosion-resistant stainless steel, it withstands exposure to moisture, chemicals, and temperature variations, minimizing downtime in industrial settings. The hex socket head with knurling ensures easy installation in confined spaces, enhancing efficiency for maintenance and production lines.

Specification Summary & Compliance

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