S-8077A816 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 material, ideal for harsh industrial environments and extended service life.
- Enhanced durability and wear resistance from the black oxide finish, providing added protection against rust and galling.
- High load-bearing capability with 70,000 psi tensile strength and 35,000 psi shear strength, ensuring reliable performance under stress.
- Precise alignment and smooth rotation due to the 5-1/2" shoulder length with standard fit, reducing component wear.
- Secure, non-slip installation facilitated by the knurled socket head and 5/32" hex drive, allowing for high torque application.
- Accurate and reliable threading with Class 3A fit and 1/4"-20 UNC coarse threads, ensuring tight, vibration-resistant connections.
- Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing safety and regulatory adherence.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial applications such as machinery assembly, automotive systems, and precision equipment. The black oxide finish enhances corrosion resistance, making it suitable for environments exposed to moisture and chemicals. Its 1/4"-20 UNC coarse thread and Class 3A thread fit provide secure fastening that resists loosening under vibration, while the 5-1/2" shoulder length ensures precise component spacing and smooth rotational movement. The knurled socket head with hex drive allows for easy installation in confined spaces, reducing assembly time and improving operational efficiency in high-stress engineering scenarios.
Specification Summary & Compliance
This shoulder screw features precise dimensions including a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005", ensuring consistent performance. It adheres to ASME B18.3 specifications for dimensional accuracy and Class 3A thread fit for superior threading. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in various industrial and international markets.
