S-92991A216 1/4"-20 x 5/8" ASME B18.3 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 thanks to brass construction, ideal for harsh industrial environments
- Exceptional thread engagement and holding power with Class 3A fit for secure, vibration-resistant assemblies
- High durability and deformation resistance provided by Rockwell B55 hardness for long service life
- Secure and reliable torque transmission with the 1/8" hex drive, preventing tool slippage
- Effective component locking with the cup point tip that bites into surfaces for a firm grip
- Wide compatibility and easy installation with standard 1/4"-20 UNC coarse threads
- Space-saving headless design for applications with limited clearance
Professional Applications & Engineering Value
This 1/4-20 UNC brass set screw is engineered to address critical challenges in precision assembly and maintenance. The brass material offers inherent corrosion resistance, making it suitable for applications in marine, chemical, and electrical industries where rust prevention is paramount. The Class 3A thread fit ensures tighter tolerances than standard fits, providing superior resistance to loosening under vibration and dynamic loads, a common failure point in machinery. The cup point tip creates a small indentation in the shaft, generating a strong mechanical lock that prevents axial movement of components on rotating parts like gears and pulleys. Combined with the 1/8" hex drive, it allows for high torque application in confined spaces, ensuring reliable fastening in demanding industrial applications.
Specification Summary & Compliance
This set screw features a 1/4"-20 UNC coarse thread with a precision Class 3A thread fit for high-strength assemblies. It is manufactured in compliance with the ASME B18.3 standard, ensuring dimensional accuracy and performance reliability. The product is also confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to strict environmental and safety regulations for hazardous substances.
