S-90298A837 5/8"-11 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 for extended service life in harsh environments
- Precise component alignment ensured by the 3/4" shoulder diameter with tight ±0.001" tolerance for reliable positioning
- Exceptional load-bearing capacity with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
- Secure installation and removal through hex socket drive and knurled head design preventing tool slippage
- Reliable thread engagement with Class 3A fit and coarse UNC threads for vibration resistance and quick assembly
- Industry-standard compatibility meeting ASME B18.3 specifications for consistent performance across equipment
- Environmental compliance with RoHS 3 and REACH standards for safe use in regulated industries
Professional Applications & Engineering Value
This 5/8"-11 UNC shoulder screw delivers critical engineering solutions where precise rotational alignment and structural integrity are paramount. The 18-8 Stainless Steel construction with passivated finish provides exceptional corrosion resistance for machinery operating in humid or chemically aggressive environments. The 3/4" shoulder diameter with minimal tolerance ensures exact component positioning in assemblies, eliminating misalignment in precision equipment, robotic arms, and conveyor systems. The Class 3A thread fit combined with coarse UNC threads maintains secure fastening under vibration, while the hex socket drive and knurled head enable efficient installation in confined spaces. These features make it ideal for industrial applications requiring durability, precision, and regulatory compliance.
Specification Summary & Compliance
Manufactured to ASME B18.3 standards with Class 3A thread fit for superior dimensional accuracy. Features include 5/8"-11 UNC coarse threads, 3/4" shoulder diameter with -0.001" to 0.001" tolerance, and 1 1/4" shoulder length with -0.005" to 0.005" tolerance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use.
