S-8077A837 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 outdoor applications.
- Enhanced durability and wear resistance from the black oxide finish, which also reduces light reflection and provides a sleek appearance.
- High mechanical strength offering 70,000 psi tensile strength and 35,000 psi shear strength for reliable performance under heavy loads.
- Precise thread engagement with Class 3A fit and 1/4"-20 UNC coarse threads, ensuring secure fastening and reduced cross-threading risks.
- Easy installation and removal using a standard 5/32" hex drive and knurled head for improved grip and torque application.
- Accurate shoulder dimensions with tight tolerances for consistent alignment in assemblies, supporting smooth rotational movement.
- Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing safety and environmental responsibility.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address common industrial challenges such as corrosion and mechanical stress in demanding applications. The black oxide finish not only enhances corrosion resistance but also minimizes galling, making it suitable for machinery, automotive, and marine environments. Its 1/4"-20 UNC coarse threads with Class 3A fit provide reliable fastening in high-vibration settings, while the 5/16" shoulder diameter ensures precise component alignment. Ideal for use in pivots, linkages, and rotating assemblies, this screw offers long-term reliability and reduces maintenance needs, supporting efficient operations in industrial shoulder bolt applications.
Specification Summary & Compliance
The screw features a Class 3A thread fit per UNC standards, ensuring tight dimensional accuracy with a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". It meets ASME B18.3 specifications for consistency and performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming adherence to environmental and safety regulations without hazardous substances.
