S-97345A242 1/4"-20 ASME B18.3 Shoulder Screws
Shoulder Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and chemical exposure.
- Precise alignment and smooth rotation ensured by the 3/8" shoulder diameter with tight tolerances for reliable assembly.
- High-strength performance delivering 70,000 psi tensile and 35,000 psi shear strength for demanding mechanical applications.
- Secure and repeatable fastening with Class 3A thread fit and 1/4"-20 UNC coarse threads, reducing the risk of cross-threading.
- Easy installation and removal using the hex drive and knurled head design, providing excellent grip and torque application.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
- Durable and long-lasting with a Rockwell B79 hardness, maintaining integrity under high stress and frequent use.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and assembly fixtures. The Class 3A thread fit and UNC coarse threads provide reliable engagement in high-vibration environments, minimizing loosening and misalignment. The 3/8" shoulder diameter with controlled tolerances ensures accurate positioning of components like gears, pulleys, and bearings, reducing wear and improving operational efficiency. With excellent corrosion resistance and compliance with RoHS and REACH, it is suitable for industries such as aerospace, medical devices, and marine equipment, where durability and regulatory standards are paramount.
Specification Summary & Compliance
This shoulder screw adheres to ASME B18.3 specifications, featuring a Class 3A thread fit for precise engagement and a shoulder diameter tolerance of -0.004" to -0.002". The 1/4"-20 UNC coarse thread and standard shoulder fit ensure consistent performance. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), meeting environmental and safety regulations for industrial use.
