S-8077A627 5/16"-18 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 construction, ideal for harsh environments and chemical exposure.
- Enhanced durability and wear resistance from the black oxide finish, providing a protective layer against abrasion and galling.
- High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under heavy loads.
- Precise assembly and secure fit with Class 3A thread fit and UNC coarse threading, ensuring minimal backlash and vibration resistance.
- Easy installation and removal using a standard 3/16" hex drive and knurled head for improved grip and torque application.
- Accurate positioning and alignment due to the precisely machined shoulder with tight diameter and length tolerances.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
Professional Applications & Engineering Value
This shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial machinery, automation systems, and precision equipment. The 316 stainless steel material provides excellent resistance to corrosion and high temperatures, making it suitable for marine, chemical processing, and outdoor applications. The black oxide finish reduces friction and prevents seizing, while the Class 3A thread fit and UNC coarse threading ensure reliable fastening in high-vibration environments. With a robust socket head and knurled texture, it allows for efficient torque transmission and easy maintenance, reducing downtime in assembly lines and mechanical systems.
Specification Summary & Compliance
This shoulder screw features a Class 3A thread fit with 5/16"-18 UNC coarse threading and precise shoulder dimensions (diameter: 3/8" with tolerance -0.004" to -0.002", length: 15/16" with tolerance -0.005" to 0.005"). It is manufactured in accordance with ASME B18.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.
