S-90298A856 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, ideal for harsh industrial environments.
- Precise component alignment thanks to the 5-1/2" shoulder length with tight ±0.005" tolerance for reliable assembly.
- High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications.
- Secure and accurate fastening with Class 3A thread fit and UNC coarse thread for vibration resistance and easy installation.
- Easy installation and removal using a standard 3/8" hex drive, reducing assembly time and tool wear.
- Knurled head design provides enhanced grip during manual adjustments, improving handling efficiency.
- Compliance with major standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
Professional Applications & Engineering Value
This 5/8"-11 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision machinery, automation systems, and heavy-duty equipment. The 18-8 stainless steel material, combined with a passivated finish, offers excellent resistance to rust and chemical exposure, extending service life in corrosive environments. The 5-1/2" shoulder length with minimal tolerance ensures exact positioning of moving parts, reducing wear and misalignment issues. Its Class 3A thread fit and coarse UNC thread provide reliable clamping force and vibration resistance, making it ideal for applications like rotating shafts, pivots, and assembly jigs where precision and strength are paramount.
Specification Summary & Compliance
This shoulder screw adheres to ASME B18.3 specifications, with a Class 3A thread fit for high precision and a shoulder diameter tolerance of -0.001" to 0.001". The UNC coarse thread (5/8"-11) and right-hand thread direction ensure compatibility with standard components. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material integrity for industrial use.
