S-91318A510 5/16"-18 x 5/32" Set Screws
Set 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 18-8 stainless steel construction, ideal for harsh industrial environments.
- Exceptional thread engagement and holding power due to the Class 3A thread fit and coarse UNC thread spacing.
- High mechanical strength and durability provided by the Rockwell B80 hardness rating.
- Secure and flush installation enabled by the headless and hex drive design, preventing protrusion and allowing high torque application.
- Reliable performance in regulated industries with full compliance to RoHS 3 and REACH environmental standards.
- Broad compatibility with standard 5/16"-18 UNC threaded components, simplifying sourcing and assembly.
- Optimized for right-hand thread applications, ensuring straightforward installation in common machinery and equipment.
Professional Applications & Engineering Value
This 5/16-18 UNC set screw is engineered to address critical challenges in precision assembly and motion control systems. The 18-8 stainless steel material provides excellent resistance to rust and oxidation, making it suitable for applications exposed to moisture, chemicals, or outdoor elements. The Class 3A thread fit and coarse thread spacing ensure a tight, secure fit that resists loosening under vibration and dynamic loads, a common issue in industrial machinery and automotive components. The hex headless design allows the screw to sit flush within a component, preventing interference in moving parts and enabling a cleaner, more compact assembly. This combination of a high-strength material and precision thread form delivers reliable performance in demanding applications such as shaft collars, gears, pulleys, and other assemblies where positional security is paramount.
Specification Summary & Compliance
This set screw features a 5/16"-18 UNC thread with a Class 3A thread fit for high precision and a coarse thread spacing. It is manufactured from 18-8 Stainless Steel with a hardness of Rockwell B80. The product 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.
