S-8077A789 3/8"-16 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 and Black Oxide finish, ideal for harsh environments and extending service life.
- High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under heavy loads.
- Precise Class 3A thread fit ensures tight, secure fastening with minimal backlash in critical assemblies.
- Easy installation and removal with a hex socket drive and knurled head for improved grip and torque application.
- Dimensional accuracy with controlled shoulder diameter and length tolerances for consistent alignment in machinery.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for safe, regulated use in various sectors.
- Versatile coarse UNC threads provide quick assembly and disassembly, reducing maintenance time.
Professional Applications & Engineering Value
This 3/8"-16 UNC shoulder screw is engineered to address common industrial challenges such as misalignment, vibration loosening, and corrosion-induced failure. Made from 316 Stainless Steel with a Black Oxide finish, it offers exceptional resistance to chemicals and moisture, making it suitable for marine, chemical processing, and outdoor equipment. The socket head design with hex drive allows for high-torque installation in confined spaces, while the knurled texture enhances handling. Its Class 3A thread fit and precise shoulder dimensions ensure accurate positioning in pivots, gears, and rotating assemblies, reducing wear and improving operational efficiency in industrial fasteners applications.
Specification Summary & Compliance
This shoulder screw features a Class 3A thread fit with UNC coarse threads, ensuring high precision and interchangeability. Dimensions include a shoulder diameter of 5/8" (tolerance: -0.004" to -0.002") and shoulder length of 5/16" (tolerance: -0.005" to 0.005"). It meets ASME B18.3 specifications for consistent quality and performance. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for global industrial use.
