S-93445A170 4-40 x 1/8" 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 for long-lasting performance in harsh environments
- Exceptional locking security provided by precision serrations that prevent loosening under vibration and dynamic loads
- High-strength threading with Class 3A UNC coarse threads ensuring reliable, precise fits and maximum holding power
- Enhanced durability from Rockwell B80 hardness, offering excellent wear resistance and repeated use capability
- Secure installation via hex drive design that allows high torque application without stripping
- Space-saving headless design ideal for applications where flush mounting is required
- Broad compatibility with cup tip design that provides positive seating on various shaft surfaces
Professional Applications & Engineering Value
This 4-40 UNC Class 3A stainless steel set screw delivers critical engineering solutions for precision assembly challenges. The combination of 18-8 stainless steel material and Rockwell B80 hardness provides exceptional resistance to corrosion and deformation, making it ideal for demanding environments like machinery, automotive components, and electronic enclosures. The precision serrations create permanent locking action that prevents rotational slip in pulleys, gears, and collars. With its headless design and hex drive, it offers flush mounting in confined spaces while allowing high torque installation. The coarse UNC threads ensure quick assembly and disassembly, reducing maintenance time in production lines and equipment servicing.
Specification Summary & Compliance
This set screw features 4-40 UNC Class 3A threads with precise dimensional accuracy per ASME B18.3 specifications. The coarse thread spacing and 0.112" thread diameter provide optimal engagement strength. Manufacturing compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial applications. The right-hand thread direction and 1/8" length maintain standardization for interchangeable use in assembly systems.
