S-97345A569 1/4"-20 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 316 stainless steel construction, ideal for harsh industrial and marine environments.
- Precise alignment and reduced assembly wear thanks to the Class 3A thread fit and standard shoulder fit for consistent performance.
- High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliable load-bearing in demanding applications.
- Secure, non-slip fastening enabled by the knurled head and 5/32" hex drive, allowing for easy installation with standard tools.
- Durable, coarse UNC thread (1/4"-20) provides excellent engagement and resistance to vibration loosening.
- Extended service life due to compliance with ASME B18.3 standards and RoHS/REACH environmental regulations.
- Accurate component positioning with a 2" shoulder length and tight diameter tolerance, minimizing play in assemblies.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, such as misalignment and corrosion-induced failure. The 1/4"-20 UNC coarse thread and Class 3A fit ensure secure, vibration-resistant connections in high-stress environments like robotics, automotive fixtures, and conveyor systems. The 2" shoulder length provides a stable bearing surface for rotating parts, reducing wear and maintenance costs. With a knurled socket head and hex drive, it offers quick, tool-friendly installation while maintaining corrosion resistance in humid or chemical-exposed settings, making it a reliable choice for OEMs and MRO applications demanding long-term durability.
Specification Summary & Compliance
This shoulder screw features a 1/4"-20 UNC thread with Class 3A fit and a shoulder diameter tolerance of -0.004" to -0.002" for precise assembly. It complies with ASME B18.3 manufacturing standards and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring environmental safety and material consistency for global industrial use.
