S-97345A251 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 environments and outdoor applications.
- Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high-stress conditions.
- Precise Class 3A thread fit ensures secure, vibration-resistant fastening with minimal risk of loosening in critical assemblies.
- Convenient installation and removal via a 3/16" hex socket drive and knurled head for enhanced grip and torque application.
- Accurate component alignment with a 2" shoulder length and controlled diameter tolerance, reducing wear and simplifying assembly.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.
- Durable coarse UNC threading provides quick engagement and high resistance to stripping, suitable for repeated use.
Professional Applications & Engineering Value
This 316 Stainless Steel shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical failure. The 1/4"-20 UNC coarse thread with a Class 3A fit ensures tight, reliable connections in machinery, automotive, and aerospace components, reducing maintenance downtime. The 2" shoulder length and precise diameter tolerance provide stable pivoting and spacing in assemblies, preventing part movement and wear. With a socket head and knurled texture, it allows for easy installation in confined spaces, while the high tensile and shear strength supports heavy-load applications, making it a versatile industrial fastener for demanding environments.
Specification Summary & Compliance
This shoulder screw features a 1/4"-20 UNC thread with Class 3A fit for precise tolerance, a shoulder diameter of 3/8" with tolerance from -0.004" to -0.002", and a shoulder length of 2" with tolerance from -0.005" to 0.005". It meets ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industry-standard reliability.
