S-94496A440 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity: With a tensile strength of 70,000 psi and minimum shear strength of 35,000 psi, this screw reliably handles high-stress applications, reducing the risk of mechanical failure.
• Precision Shoulder for Accurate Alignment: The 2 1/2" shoulder length with a tight tolerance of ±0.005" ensures exact component positioning, minimizing assembly errors and improving operational efficiency.
• Enhanced Corrosion Resistance: Zinc plating provides a durable protective layer, extending the screw's service life in harsh industrial environments and reducing maintenance needs.
• Easy Installation and Removal: The external hex drive and smooth hex head allow for quick, secure tightening with standard tools, speeding up assembly and disassembly processes.
• Reliable Thread Performance: Coarse 3/8"-16 UNC threads with Class 2A fit offer consistent engagement and vibration resistance, ensuring stable connections in dynamic applications.
• Robust Material Durability: Made from steel with Rockwell B80 hardness, this screw maintains integrity under repeated use, supporting long-term reliability in demanding settings.
• Compliance with Environmental Standards: Meets RoHS 3 and REACH regulations, assuring safe use in regulated industries and facilitating global supply chain integration.

Professional Applications & Engineering Value

This steel shoulder screw is engineered to address critical challenges in precision machinery and industrial assemblies, where misalignment and component wear are common issues. The 2 1/2" shoulder length with tight tolerances acts as a precise pivot or spacer, ensuring accurate alignment in applications like rotating shafts, pulleys, and linkages. The 3/8"-16 UNC coarse threads and Class 2A fit provide secure fastening with excellent vibration resistance, reducing loosening in high-motion environments. Combined with a zinc-plated finish, it offers corrosion protection for extended use in automotive, aerospace, and manufacturing equipment. This design minimizes downtime and maintenance costs, delivering reliable performance in heavy-duty applications that demand both strength and precision.

Specification Summary & Compliance

This shoulder screw adheres to precise dimensional standards, including a Class 2A thread fit for consistent engagement and a shoulder diameter tolerance of -0.004" to 0" with length tolerance of ±0.005". It conforms to UNC thread standards and is manufactured from high-strength steel, ensuring compatibility with industrial specifications. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel and REACH (EC 1907/2006), meeting environmental and safety regulations for global use.