S-90298A716 3/8"-16 ASME B18.3 Shoulder Screws
Shoulder Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional corrosion resistance with 18-8 stainless steel and passivated finish, ideal for harsh environments
- High tensile strength of 70,000 psi ensures reliable performance in demanding, high-stress applications
- Precision Class 3A thread fit guarantees secure, vibration-resistant fastening with minimal backlash
- Knurled hex socket head provides superior grip and easy installation, even with gloved hands
- Accurate 1-1/2" shoulder length with ±0.005" tolerance enables precise component alignment and spacing
- Compliance with ASME B18.3, RoHS 3, and REACH ensures quality, safety, and environmental standards are met
- Coarse UNC threads facilitate quick assembly and disassembly, reducing maintenance time
Professional Applications & Engineering Value
This stainless steel shoulder screw is engineered to address common industrial challenges, such as misalignment and component wear. The 1-1/2" shoulder length with tight tolerances provides a stable bearing surface for rotating parts like gears and pulleys, reducing friction and extending equipment life. Made from 18-8 stainless steel with a passivated finish, it resists corrosion in moist or chemical environments, making it ideal for machinery, automotive assemblies, and conveyor systems. The hex socket drive and knurled head ensure secure tool engagement, preventing slippage during high-torque installation. With UNC coarse threads and Class 3A fit, it offers reliable fastening in heavy-duty applications, minimizing downtime and maintenance costs.
Specification Summary & Compliance
This shoulder screw adheres to ASME B18.3 specifications, ensuring dimensional accuracy and performance. Threads are 3/8"-16 UNC with a Class 3A fit for precise engagement, while the shoulder diameter tolerance is -0.001" to 0.001" and length tolerance is -0.005" to 0.005". It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), meeting environmental and safety standards for industrial use.
