S-8077A578 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.
- High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications.
- Precise alignment and reduced wear thanks to the knurled head and standard shoulder fit for secure component positioning.
- Reliable, coarse-thread engagement with UNC Class 3A threads ensuring quick assembly and vibration resistance.
- Easy installation and removal using a standard hex drive (3/16"), compatible with common tools.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality assurance and environmental safety.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial settings, such as misalignment and corrosion in machinery. The black oxide finish enhances surface hardness and reduces friction, prolonging service life in high-stress applications like pivots, bearings, and linkages. Its UNC coarse threads and Class 3A fit provide secure fastening with minimal risk of loosening under vibration, while the knurled head improves grip during manual adjustments. Ideal for precision equipment and assembly lines, this screw ensures consistent performance in automotive, aerospace, and marine environments, where corrosion resistance and high tensile strength are paramount.
Specification Summary & Compliance
This shoulder screw features precise dimensions, including a shoulder diameter of 3/8" (tolerance: -0.004" to -0.002") and thread length of 1/2", with UNC coarse threads meeting Class 3A tolerances for accuracy. Manufactured in compliance with ASME B18.3 standards, it ensures reliable performance in mechanical assemblies. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for industrial use.
