S-90298A149 8-32 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 construction and passivated finish, ideal for harsh industrial environments
- Precise component alignment ensured by the 3/16" shoulder with tight ±0.001" diameter tolerance for reliable assembly
- High-strength thread engagement with 8-32 UNC Class 3A coarse threads providing secure fastening in demanding applications
- Easy installation and removal using the standard hex socket drive, reducing assembly time and tool wear
- Long-term reliability backed by compliance with ASME B18.3 specifications for consistent performance
- Environmental and safety compliance meeting RoHS 3 and REACH standards for global industrial use
- Smooth head texture minimizes friction and damage to mating surfaces during operation
Professional Applications & Engineering Value
This stainless steel shoulder screw is engineered to address critical alignment and durability challenges in precision machinery. The 18-8 stainless steel material combined with a passivated finish provides excellent resistance to corrosion and wear, extending service life in environments exposed to moisture or chemicals. The 3/16" shoulder length with minimal diameter tolerance ensures exact positioning of components like gears, pulleys, and rotating assemblies, reducing vibration and misalignment issues. With its 8-32 UNC Class 3A thread and hex socket drive, it offers quick, secure fastening for applications in automation, aerospace, and medical equipment, where repeatable accuracy and compliance with ASME B18.3 standards are essential for operational safety and efficiency.
Specification Summary & Compliance
This shoulder screw adheres to Class 3A thread fit for high precision and features a shoulder diameter tolerance of -0.001" to 0.001" and shoulder length tolerance of -0.005" to 0.005". It conforms to ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial and technical applications.
