S-90298A877 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
- Exceptional Corrosion Resistance with 18-8 Stainless Steel construction and passivated finish, ensuring longevity in harsh environments.
- High Tensile Strength of 70,000 psi provides reliable load-bearing capacity for heavy-duty applications.
- Precision Shoulder Diameter with ±0.001" tolerance for accurate alignment and reduced wear in assemblies.
- Secure Hex Drive with 1/2" size and knurled head for non-slip, high-torque installation and removal.
- Class 3A Thread Fit and UNC coarse threads deliver superior engagement and vibration resistance.
- Rockwell B55 Hardness enhances durability and resistance to deformation under stress.
- Compliance with ASME B18.3 and environmental standards (RoHS 3, REACH) ensures quality and regulatory safety.
Professional Applications & Engineering Value
This shoulder screw is engineered to address critical alignment and load distribution challenges in industrial machinery, automation systems, and precision equipment. The 18-8 Stainless Steel material, combined with a passivated finish, offers excellent corrosion resistance, reducing maintenance in humid or chemical-exposed settings. The 1" shoulder diameter with tight tolerances ensures precise component positioning, minimizing misalignment and wear. With a 3/4"-10 UNC Class 3A thread and coarse thread spacing, it provides robust fastening in high-vibration environments, while the 1/2" hex drive and knurled head enable efficient installation in confined spaces. Ideal for applications like pivots, shafts, and rotating assemblies, this screw enhances operational reliability and reduces downtime.
Specification Summary & Compliance
This shoulder screw features a Class 3A thread fit with UNC coarse threads for precise engagement, and dimensional accuracy including a shoulder diameter tolerance of -0.001" to 0.001" and shoulder length tolerance of -0.005" to 0.005". It is manufactured in accordance with ASME B18.3 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental safety and quality assurance.
