S-93445A425 1/4"-20 x 3/8" 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 with 18-8 stainless steel construction, ideal for harsh environments and extended service life
- Maximum holding power and vibration resistance achieved through precision Class 3A thread fit and locking serrations
- High-strength, durable performance backed by Rockwell B80 hardness for reliable, repeated use
- Secure, non-slip fastening with the cup tip design that digs into surfaces to prevent component movement
- Easy installation and removal using the 1/8" hex drive, allowing for high torque application in confined spaces
- Wide industrial compatibility with 1/4"-20 UNC coarse threads, ensuring easy sourcing and replacement
- Full regulatory compliance meeting ASME B18.3 standards and environmental directives like RoHS 3 & REACH
Professional Applications & Engineering Value
This 1/4-20 UNC Class 3A set screw is engineered to solve critical fastening challenges in demanding industrial applications. The 18-8 stainless steel material provides excellent resistance to corrosion and oxidation, making it suitable for machinery, automotive, and outdoor equipment exposed to moisture or chemicals. Its headless design with a hex drive allows for flush mounting in tight spaces, while the locking serrations and cup tip work synergistically to prevent loosening under high vibration, ensuring permanent component alignment in pulleys, gears, and collars. The coarse UNC thread facilitates quick assembly and disassembly, reducing maintenance downtime. This combination of features delivers reliable holding power and long-term performance in precision engineering and manufacturing settings.
Specification Summary & Compliance
This set screw features a 1/4"-20 UNC coarse thread with a precision Class 3A thread fit for tight tolerances and secure fastening. It complies with ASME B18.3 manufacturing specifications and is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets stringent environmental and safety standards for industrial use.
