S-90291A074 2-56 ASME B18.3 Set Screws
Set Screws
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Basic Information
Head Parameters
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
Installation & Application
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
- Precise Class 3A thread fit ensures reliable, vibration-resistant fastening in critical assemblies
- Non-marring nylon 6/6 tip protects sensitive surfaces while maintaining secure positioning
- Wide temperature tolerance from -50° to 250°F for stable performance across diverse operating conditions
- Compact headless hex drive design allows installation in confined spaces with standard .035" hex tools
- Industry-standard UNC coarse threading provides quick assembly and superior holding power
- Enhanced durability with Rockwell B80 hardness for long service life under mechanical stress
Professional Applications & Engineering Value
This 2-56 UNC set screw delivers exceptional engineering value in precision assembly applications where surface protection and vibration resistance are critical. The 18-8 stainless steel construction provides excellent corrosion resistance for demanding environments, while the green nylon 6/6 plastic tip prevents damage to expensive components during clamping operations. The headless hex drive design with .035" drive size enables installation in tight spaces where traditional fasteners cannot fit. Particularly valuable in electronics, machinery, and precision instrument manufacturing, this set screw maintains consistent clamping force through its Class 3A thread fit and coarse UNC threading, ensuring reliable performance in vibration-prone applications. The combination of stainless steel hardness and nylon tip flexibility creates an optimal balance between secure fastening and surface protection.
Specification Summary & Compliance
This precision fastener features 2-56 UNC coarse threading with Class 3A thread fit for superior dimensional accuracy. Manufactured to ASME B18.3 standards with right-hand thread direction and hex drive configuration. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. The nylon tip maintains consistent performance across the specified temperature range of -50° to 250°F.
