S-90298A152 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, ensuring long-term reliability in harsh environments.
- Precise alignment and smooth rotation thanks to the 3/16" shoulder diameter with tight tolerance (±0.001"), reducing wear in moving assemblies.
- High-strength thread engagement with Class 3A UNC coarse threads, providing secure fastening and vibration resistance.
- Easy installation in confined spaces using the hex socket drive (3/32"), allowing high torque application without slipping.
- Consistent dimensional accuracy per ASME B18.3 standard, ensuring interchangeability and reducing assembly errors.
- Environmental and safety compliance with RoHS 3 and REACH regulations, making it suitable for global industrial markets.
- Durable right-hand thread design with 3/8" shoulder length, offering stable pivoting and load-bearing support.
Professional Applications & Engineering Value
This socket head shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 18-8 stainless steel material, combined with a passivated finish, resists corrosion and oxidation, extending service life in industrial machinery and automation systems. The UNC coarse threads with Class 3A fit ensure tight, reliable fastening that withstands vibrations, while the smooth shoulder diameter acts as a pivot or bearing surface, minimizing friction and wear. Ideal for applications requiring exact positioning, such as robotic arms or conveyor systems, this fastener enhances operational efficiency and reduces maintenance needs.
Specification Summary & Compliance
The screw adheres to ASME B18.3 specifications, with a Class 3A thread fit for high precision. Key dimensions include a 3/16" shoulder diameter (tolerance: -0.001" to 0.001") and 3/8" shoulder length (tolerance: -0.005" to 0.005"), ensuring consistent performance. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, supporting safe and sustainable manufacturing practices.
