S-90298A879 3/4"-10 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.
- High torque transmission enabled by the 1/2" hex socket drive, reducing tool slippage and assembly time.
- Exceptional strength and durability with 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty applications.
- Precise alignment and smooth rotation due to the 1" shoulder diameter with tight ±0.001" tolerance.
- Reliable thread engagement with Class 3A UNC coarse threads, ensuring secure fastening in high-vibration settings.
- Enhanced grip and handling from the knurled head texture, facilitating manual adjustments in confined spaces.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing safety and regulatory adherence.
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to address critical challenges in machinery assembly, automation systems, and precision equipment. The 3/4"-10 UNC coarse thread and Class 3A fit provide robust, vibration-resistant connections, minimizing loosening in dynamic operations. The passivated finish enhances corrosion resistance, extending service life in moist or chemically aggressive environments. With a 1" shoulder diameter and minimal tolerances, it ensures exact component alignment, reducing wear and improving operational accuracy. Ideal for pivots, axles, and rotating mechanisms, this screw delivers reliable performance in industrial fasteners applications, supported by high tensile strength and a secure hex socket drive for efficient installation.
Specification Summary & Compliance
The screw features precise Class 3A thread fit and shoulder dimensions with tolerances of -0.001" to 0.001" for diameter and -0.005" to 0.005" for length. It adheres to ASME B18.3 specifications for design and manufacturing, ensuring interoperability and reliability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), it meets environmental and safety standards for global industrial use.
