S-90291A542 1/4"-20 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
- Secure, Non-Marring Fastening: Nylon 6/6 plastic tip prevents damage to shafts and components, maintaining surface integrity.
- Superior Corrosion Resistance: Made from 18-8 Stainless Steel for excellent durability in harsh environments.
- High-Precision Thread Fit: Class 3A thread fit ensures tight tolerances and reliable, vibration-resistant connections.
- Wide Temperature Tolerance: Nylon tip performs reliably from -50° to 250° F, suitable for diverse operating conditions.
- Easy Installation & Removal: 1/8" hex drive allows for straightforward assembly and disassembly with standard tools.
- Enhanced Grip & Vibration Resistance: Coarse UNC thread provides strong holding power, reducing loosening under stress.
- Consistent Mechanical Strength: Rockwell B80 hardness offers a balance of toughness and resistance to deformation.
Professional Applications & Engineering Value
This 1/4-20 UNC hex drive set screw is engineered to address critical assembly challenges in industrial settings. The 18-8 stainless steel construction provides inherent corrosion resistance, making it ideal for applications in machinery, automotive, and electronics where exposure to moisture or chemicals is a concern. The nylon tip is specifically designed to prevent marring and galling on precision shafts and gears, ensuring that components remain undamaged during repeated adjustments. With its Class 3A thread fit and coarse thread design, it delivers superior clamping force and vibration resistance, reducing maintenance needs and enhancing the longevity of assemblies. This makes it a reliable choice for securing collars, pulleys, and knobs in high-stress environments.
Specification Summary & Compliance
This set screw features a 1/4"-20 UNC coarse thread with a Class 3A thread fit for precise dimensional accuracy. It is manufactured in compliance with ASME B18.3 specifications and meets regulatory standards including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring environmental and safety adherence for global industrial use.
