S-97768A417 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 construction and black oxide finish, ideal for harsh industrial environments
- Precise alignment and smooth rotation ensured by the 1/2" diameter shoulder with tight manufacturing tolerances
- Superior load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for heavy-duty applications
- Reliable, slip-resistant installation thanks to the knurled socket head and hex drive for secure tool engagement
- Consistent thread performance with Class 3A fit and UNC coarse threads for quick assembly and vibration resistance
- Broad industry compliance meeting ASME B18.3 specifications and environmental standards like RoHS 3 and REACH
- Enhanced durability with Rockwell B55 hardness for long service life under mechanical stress
Professional Applications & Engineering Value
This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and rotational challenges in precision assemblies. The 1/2" shoulder diameter with controlled tolerances provides a stable bearing surface, reducing wear in pulleys, gears, and linkages. Made from 18-8 stainless steel with a black oxide finish, it resists corrosion in demanding settings like machinery, automotive, and outdoor equipment. The knurled socket head ensures firm tool grip, preventing cam-out during high-torque installation. With a Class 3A thread fit and UNC coarse threads, it offers rapid assembly and reliable performance in high-vibration environments, making it a trusted choice for engineers seeking durability and precision.
Specification Summary & Compliance
This shoulder screw adheres to strict dimensional standards, including a Class 3A thread fit for precise engagement and UNC thread specifications. The shoulder features a diameter tolerance of -0.004" to -0.002" and length tolerance of ±0.005" for consistent performance. It complies with ASME B18.3 manufacturing guidelines and is certified to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and sustainability in industrial use.
