S-91273A226 3/8"-24 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life.
• High tensile and shear strength (70,000 psi tensile, 35,000 psi shear) ensures reliable performance under heavy loads and stress.
• Precise Class 2A thread fit for smooth assembly and secure fastening, reducing the risk of cross-threading and improving efficiency.
• Knurled head with hex drive provides excellent grip and torque application, minimizing slippage during installation.
• Accurate shoulder dimensions (1 1/2" length with tight tolerances) enable precise alignment and spacing in mechanical assemblies.
• Fine UNF thread offers better vibration resistance and finer adjustment control compared to coarse threads.
• Compliance with RoHS 3 and REACH ensures environmental safety and meets international regulatory standards for industrial use.

Professional Applications & Engineering Value

This 3/8"-24 UNF stainless steel shoulder screw is engineered to address critical alignment and durability challenges in precision machinery. The 18-8 stainless steel material provides excellent corrosion resistance, making it suitable for applications in humid or chemically aggressive environments, such as automotive, aerospace, and manufacturing equipment. The fine thread and Class 2A fit ensure secure fastening with minimal play, reducing wear and maintenance needs. The 1 1/2" shoulder length with controlled tolerances allows for precise component positioning, preventing misalignment in rotating assemblies like bearings and pulleys. Its high tensile strength and Rockwell B55 hardness further enhance reliability in high-stress scenarios, offering long-term performance and reduced downtime.

Specification Summary & Compliance

This shoulder screw adheres to Class 2A thread fit standards with precise dimensions, including a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". It conforms to UNF fine thread specifications and is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for global industrial applications.