S-8077A339 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-strength performance with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliable load-bearing in demanding applications.
- Precise shoulder positioning with a knurled head and standard shoulder fit, offering excellent alignment and anti-rotation properties.
- Easy installation and removal using a 1/4" hex drive socket head, allowing for high torque application without slippage.
- Secure and reliable threading with UNC coarse thread and Class 3A fit, providing excellent engagement and vibration resistance.
- Full regulatory compliance with ASME B18.3, RoHS 3, and REACH standards, ensuring safety and environmental responsibility.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to solve critical challenges in industrial assembly, where corrosion resistance and precise component alignment are paramount. The black oxide finish not only enhances durability but also reduces galling in high-stress environments. Featuring a UNC coarse thread and Class 3A fit, it ensures rapid assembly and reliable fastening in machinery, automotive, and aerospace applications. The knurled head provides superior grip for manual adjustments, while the precision shoulder diameter and length maintain exact positioning in linkages, bearings, and pivots, reducing wear and improving operational lifespan.
Specification Summary & Compliance
This shoulder screw adheres to ASME B18.3 specifications, with a Class 3A thread fit for tight tolerances and a shoulder diameter tolerance of -0.004" to -0.002". It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use.
