S-97345A677 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 material, ideal for harsh industrial and marine environments.
- Enhanced assembly precision through Class 3A thread fit, ensuring tight tolerances and reliable fastening.
- High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for demanding applications.
- Secure and easy installation with a hex socket drive and knurled head, providing excellent grip and torque transmission.
- Durable and long-lasting performance backed by Rockwell B79 hardness, resisting wear and deformation.
- Broad compatibility with UNC coarse threads and standard shoulder fit, facilitating interchangeability in various machinery.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial settings, such as corrosion and mechanical stress. The UNC coarse threads and Class 3A fit provide precise alignment and vibration resistance, reducing the risk of loosening in high-load assemblies like machinery, automotive components, and precision instruments. The knurled head and hex drive enable quick, secure installation, while the 2 1/4" shoulder length acts as a reliable pivot or spacer, minimizing part wear. Ideal for applications requiring high tensile strength and environmental durability, this screw ensures long-term reliability in demanding engineering projects.
Specification Summary & Compliance
This shoulder screw features precise dimensions, including a 1/4"-20 UNC thread with Class 3A fit for tight tolerances, and a shoulder diameter tolerance of -0.004" to -0.002". It meets ASME B18.3 specifications for consistent performance and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity in industrial use.
