S-91273A281 3/4"-10 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and reducing replacement frequency.
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and mechanical stress.
• Precision-machined 3" shoulder with tight tolerances provides accurate alignment and acts as a bearing surface or pivot point.
• Knurled head and hex socket drive offer enhanced grip and secure tool engagement, preventing slippage during installation.
• Coarse UNC thread with Class 2A fit allows for quick assembly and disassembly while maintaining secure fastening.
• Compliance with RoHS 3 and REACH ensures environmental safety and meets global regulatory standards for industrial components.
• Rockwell B55 hardness provides excellent durability and wear resistance for long-term use in demanding applications.

Professional Applications & Engineering Value

This 3/4"-10 UNC shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial machinery. The 18-8 stainless steel material offers inherent corrosion resistance, making it suitable for applications exposed to moisture, chemicals, or outdoor conditions. The precisely machined 3" shoulder length with minimal tolerance variations serves as an accurate axle or dowel, reducing component wear and simplifying assembly in automated systems. The hex drive and knurled head enhance installation efficiency, while the coarse thread ensures rapid fastening in high-volume production environments. Commonly used in robotics, conveyor systems, and precision equipment, this shoulder screw provides reliable performance where dimensional stability and strength are paramount.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent engagement. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring high precision. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming its suitability for regulated industrial and international markets.