S-90669A074 2-56 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
- Precision brass tip provides superior grip while protecting delicate surfaces from damage during installation
- Corrosion-resistant 18-8 stainless steel construction ensures long-term reliability in harsh industrial environments
- Class 3A thread fit delivers tighter tolerances for secure, vibration-resistant fastening in precision assemblies
- Hex drive design allows for high torque application and easy installation in confined spaces
- Headless configuration enables flush mounting for applications where protruding components are not feasible
- Rockwell B80 hardness provides optimal balance between strength and machinability for repeated use
- Environmental compliance meets RoHS and REACH standards for use in regulated industries worldwide
Professional Applications & Engineering Value
This 2-56 UNC brass tip set screw solves critical engineering challenges in precision assemblies where surface protection and vibration resistance are paramount. The soft brass tip prevents marring of shafts, gears, and collars while maintaining superior holding power, eliminating the need for additional protective components. Manufactured from 18-8 stainless steel, it withstands corrosive environments in automotive, aerospace, and electronic enclosures where reliability is non-negotiable. The Class 3A thread fit and coarse UNC thread profile ensure secure fastening against loosening under dynamic loads, while the hex drive accommodates high installation torque in space-constrained applications. This combination of features makes it ideal for permanent positioning of components on shafts and within assemblies where disassembly is infrequent but precision is critical.
Specification Summary & Compliance
This precision fastener features Class 3A thread fit with UNC coarse threads (2-56) and right-hand thread direction, manufactured to ASME B18.3 specifications for dimensional accuracy and performance reliability. The component meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) environmental standards, ensuring suitability for global industrial applications. With a Rockwell B80 hardness rating and precise dimensional tolerances including 0.086" thread diameter and 1/8" length, this set screw delivers consistent performance in demanding mechanical assemblies.
