S-91416A215 5/16"-18 x 3/4" ASME B18.6.2 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
- Exceptional holding power from Rockwell C45 hardness alloy steel construction, resisting deformation under high stress
- Superior torque transmission with the square head and external square drive design, preventing tool slippage during installation
- Reliable fastening in demanding environments due to coarse UNC threads that resist loosening from vibration
- Precise and secure thread engagement ensured by the Class 2A thread fit, reducing the risk of cross-threading
- Enhanced component protection with the cup tip, which minimizes surface damage to the mating part
- Long-term operational reliability from the durable alloy steel material, providing excellent wear resistance
- Global compliance and safety by meeting ASME B18.6.2, RoHS 3, and REACH regulations
Professional Applications & Engineering Value
This 5/16"-18 UNC alloy steel set screw is engineered to solve critical fastening challenges in industrial machinery, automotive assemblies, and heavy equipment. The coarse thread and Class 2A fit provide rapid installation and secure locking, even in high-vibration environments where fine threads might fail. The square head with external square drive delivers maximum torque transfer, reducing installation time and preventing damage to the drive system. Manufactured from alloy steel with Rockwell C45 hardness, it offers superior shear and tensile strength, ensuring the screw maintains its clamp load under extreme operational stresses. The cup tip design concentrates force for a firm grip without marring shafts or collars, making it ideal for permanent positioning applications in pulleys, gears, and couplings.
Specification Summary & Compliance
This set screw maintains Class 2A thread fit per unified inch standards, ensuring dimensional accuracy and interchangeability. It conforms to the ASME B18.6.2 specification for square head set screws, guaranteeing consistent performance and reliability. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of hazardous substances and safe for use in various international markets.
