S-95289A142 1/4"-28 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 industrial environments and extended service life.
- Exceptional thread precision with Class 3A fit, ensuring tight, secure fastening and reduced risk of loosening under vibration.
- Enhanced durability and strength from Rockwell B80 hardness, providing reliable performance in high-stress applications.
- Secure and efficient installation via the 1/8" hex drive, allowing for easy torque application in confined spaces.
- Improved gripping capability due to the extended tip design, which increases contact area for more stable component positioning.
- Wide regulatory compliance with ASME B18.3, RoHS 3, and REACH standards, ensuring safety and environmental responsibility.
- Fine thread spacing for precise adjustments and better load distribution in delicate assemblies.
Professional Applications & Engineering Value
This 1/4"-28 UNF Class 3A set screw is engineered to address common industrial challenges such as component slippage and corrosion-induced failure. Made from 18-8 Stainless Steel, it offers excellent resistance to rust and chemicals, making it suitable for applications in machinery, automotive, and electronics where exposure to moisture or contaminants is a concern. The extended tip and fine thread spacing enhance grip and alignment, reducing the need for frequent retightening in vibrating environments. Its hex headless design with a 1/8" drive allows for compact installation, ideal for precision equipment and assemblies requiring reliable, long-term fastening without protruding parts.
Specification Summary & Compliance
This set screw features a Class 3A thread fit for high precision, with a thread size of 1/4"-28 UNF and fine spacing. It complies with ASME B18.3 manufacturing standards and is certified RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring adherence to environmental and safety regulations. Dimensions include a 0.25" thread diameter, 3/8" length, and extended tip with specified tolerances for consistent performance.
