S-90298A810 1/2"-13 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 ensured by the 4" shoulder with tight diameter tolerance of ±0.001" and length tolerance of ±0.005".
- High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications.
- Reliable thread engagement provided by Class 3A UNC coarse threads, ensuring secure fastening and vibration resistance.
- Easy installation and removal with a 5/16" hex socket drive and knurled head for improved grip.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality assurance and environmental safety.
- Versatile right-hand thread design compatible with standard UNC components, simplifying assembly processes.
Professional Applications & Engineering Value
This 1/2"-13 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, provides excellent resistance to corrosion and wear, extending service life in demanding conditions. The 4" shoulder length with minimal tolerances ensures precise positioning of moving parts, reducing misalignment and component stress. With a Class 3A thread fit and coarse thread spacing, it offers robust holding power and vibration resistance, making it ideal for applications in robotics, conveyor systems, and industrial fixtures where reliability is paramount.
Specification Summary & Compliance
This shoulder screw adheres to ASME B18.3 specifications, featuring a 1/2"-13 UNC thread with Class 3A fit for high precision. The shoulder diameter tolerance is -0.001" to 0.001", and shoulder length tolerance is -0.005" to 0.005". It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.
