S-90298A746 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
- Superior corrosion resistance with 18-8 stainless steel and passivated finish, ideal for harsh industrial environments
- Exceptional precision and stability from a 1/2" shoulder diameter with tight ±0.001" tolerance for accurate alignment
- High-strength durability with Rockwell B55 hardness, ensuring reliable performance under heavy loads
- Easy installation and removal using a standard hex drive and knurled head for improved grip
- Secure, vibration-resistant fastening with UNC coarse threads and Class 3A fit for minimal loosening
- Versatile 5" shoulder length providing ample spacing for components in assemblies and pivots
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for safe, regulated use
Professional Applications & Engineering Value
This shoulder screw is engineered to address critical alignment and wear issues in precision machinery, such as in industrial automation and rotating assemblies. The 18-8 stainless steel material, combined with a passivated finish, resists corrosion and extends service life in demanding conditions. The 1/2" shoulder diameter with minimal tolerance ensures components remain securely positioned, reducing misalignment and downtime. With UNC coarse threads and a Class 3A fit, it offers reliable, vibration-resistant fastening, making it ideal for applications requiring repeated adjustments. The 5" shoulder length accommodates various part thicknesses, enhancing design flexibility in heavy-duty equipment.
Specification Summary & Compliance
This shoulder screw features a 3/8"-16 UNC thread with Class 3A precision fit, ensuring tight tolerances for reliable performance. It adheres to ASME B18.3 manufacturing standards and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility. The shoulder diameter and length maintain strict tolerances (e.g., -0.001" to 0.001" for diameter), supporting high-accuracy applications.
