S-97345A661 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.
- Exceptional mechanical strength delivering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high stress.
- Precise Class 3A thread fit ensures tight tolerances and secure fastening in demanding applications.
- Knurled hex socket head provides enhanced grip and slip resistance during installation and removal.
- Robust shoulder design with 3/8" diameter and 15/16" length offers stable bearing surfaces and accurate component alignment.
- Broad compliance with ASME B18.3, RoHS 3, and REACH standards guarantees quality and environmental safety.
- Coarse 1/4"-20 UNC threads enable quick assembly and reduced cross-threading risk in various materials.
Professional Applications & Engineering Value
This 316 Stainless Steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. The Class 3A thread fit and coarse UNC threads ensure consistent engagement and vibration resistance, minimizing loosening in dynamic operations. Its high tensile strength of 70,000 psi and corrosion-resistant material make it suitable for applications in chemical processing, food manufacturing, and outdoor installations where durability is paramount. The knurled hex socket head allows for secure tool engagement, reducing wear and improving maintenance efficiency. By integrating a precisely machined shoulder, it facilitates accurate alignment in assemblies like rotating shafts and bearings, enhancing overall system reliability and reducing downtime.
Specification Summary & Compliance
This shoulder screw features a 1/4"-20 UNC thread with Class 3A fit for high precision, along with a shoulder diameter of 3/8" and length of 15/16" within tight tolerances. It meets ASME B18.3 specifications for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity in industrial use.
