S-8077A797 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
- Enhanced durability and wear resistance from the black oxide finish, reducing maintenance needs
- High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Precise thread engagement thanks to Class 3A fit and UNC 1/4"-20 coarse threads, ensuring reliable fastening
- Secure grip and easy installation with knurled socket head and 5/32" hex drive, minimizing slippage
- Accurate component alignment through standardized shoulder diameter and length tolerances
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality assurance
Professional Applications & Engineering Value
This 316 Stainless Steel shoulder screw with black oxide finish is engineered to address critical challenges in industrial settings, such as corrosion in chemical processing or marine environments. The UNC 1/4"-20 coarse threads and Class 3A fit provide exceptional thread engagement, reducing the risk of loosening under vibration in machinery assembly. The knurled socket head and hex drive enable quick, secure installation with standard tools, enhancing efficiency in production lines. With a Rockwell B79 hardness and high tensile strength, it supports heavy-duty applications like robotics, automotive components, and precision equipment, ensuring long-term reliability and reduced downtime.
Specification Summary & Compliance
This shoulder screw features precision dimensions, including a thread size of 1/4"-20 UNC with Class 3A fit for tight tolerances, and shoulder diameter and length tolerances of -0.004" to -0.002" and -0.005" to 0.005", respectively. Manufactured in compliance with ASME B18.3 standards, it ensures consistent performance. The product is also RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting environmental and safety regulations for global industrial use.
